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PC-SIG Diskette Library (Disk #121)

[PCjs Machine "ibm5160"]

Waiting for machine "ibm5160" to load....

Information about “LETUS A-B-C VOL 1”

Letus A-B-C is a database in PC-FILE III format containing references
to articles in six major PC oriented magazines, beginning with 1982.
This release of Letus A-B-C --one of three (#121-123)-- covers the
following five magazines devoted to the IBM PC: Softalk (SOFT),
Personal Computer Age (PCAGE), PC Magazine (PCMAG), PC World (PCW),
and PC Tech Journal (PCTEC).

This database provides the PC user with a tool for easily performing
literature searches at a very nominal cost in one's office or home.
The search is done by keyword fields as well as identification fields
(i.e., author, title, magazine issue, and page); also, the authors
have included three lines that give a general, terse description of

System Requirements: 2 disk drives, PC-FILE III (Disk No 5)

How to Start: It is very important to read the Documentation file
(Letus.doc) either by screening it (entering TYPE LETUS.DOC at the A>
and using CTRL-S to pause it) or accessing it with your word
processor.  To run it, "boot-up" the DOS system and put PC-FILE system
disk in drive A; enter PC-FILE <CR>.  PC-FILE will ask where the
database is; you will have put Letus A-B-C Disk #1 in drive "B", so
you will enter B:LETUS <CR>.  The various files on this diskette,
corresponding to magazine and year, will be displayed on the screen
for your selection.

Suggested Registration:  $ 10.00 per disk

File Descriptions:

PLOGO82  COM  Prints out LETUS A-B-C documentation
SOFT82   ???  Softalk 1982 magazine reference files (4 files)
PCMAG82  ???  PC Magazine 1982 magazine reference files (4 files)
PCAGE82  ???  PC Age 1982 magazine reference files (4 files)
LETUS    BAT  Batch file for starting Letus
BYTE82   ???  Byte 1982 magazine reference files (4 files)
LETUS    DOC  Documentation for using Letus  (11 pages)
LOGO82   COM  Generates Letus logo


PC-SIG Disk No. #121, version v1 

The following is a list of the file checksums which should be produced by
the CRCK4 program on disk #9 (and others).  If the CRC numbers do not match
you may have a bad file.  To use type:  CRCK4 <filespec>

CRCK4 output for this disk:

CTL-S pauses, CTL-C aborts

--> FILE:  SOFT82  .DTA         CRC = A0 A5

--> FILE:  SOFT82  .INX         CRC = 77 7F

--> FILE:  SOFT82  .HDR         CRC = 24 85

--> FILE:  SOFT82  .KEY         CRC = 8A 91

--> FILE:  PCMAG82 .DTA         CRC = A9 C0

--> FILE:  PCMAG82 .INX         CRC = 8B ED

--> FILE:  PCMAG82 .HDR         CRC = 24 85

--> FILE:  PCMAG82 .KEY         CRC = 3C AF

--> FILE:  PCAGE82 .DTA         CRC = 51 BF

--> FILE:  PCAGE82 .INX         CRC = 44 39

--> FILE:  PCAGE82 .HDR         CRC = 24 85

--> FILE:  PCAGE82 .KEY         CRC = CE 91

--> FILE:  BYTE82  .DTA         CRC = 03 56

--> FILE:  BYTE82  .INX         CRC = 40 11

--> FILE:  BYTE82  .HDR         CRC = EC 49

--> FILE:  BYTE82  .KEY         CRC = 63 BB

--> FILE:  LETUS   .BAT         CRC = 00 00

--> FILE:  LOGO82  .COM         CRC = C2 C7

--> FILE:  PLOGO82 .COM         CRC = 90 95

--> FILE:  LETUS   .DOC         CRC = 68 DA

 ---------------------> SUM OF CRCS = 36 CA


These and other Public Domain and user-supported programs from:

PC Software Interest Group
1125 Stewart Ct  Suite G
Sunnyvale, CA 94086
(408) 730-9291


				  Letus A-B-C (tm)


		       A Database of Articles and Letters From
		       Magazines About IBM Personal Computers

			   (C)Copyright 1984 by R. Nelson

	R. Nelson
	3790 El Camino Real, Suite 2006
	Palo Alto, CA 94306

	Compuserve: 71076,172
	(415) 493-4306



	    INTRODUCTION................................................ 1
	    PC-FILE: GENERAL INFORMATION................................ 2
	    GETTING STARTED WITH LETUS A-B-C............................ 3
	    LETUS A-B-C FILE NAMES...................................... 3
	    LETUS A-B-C RECORD DEFINITION............................... 5
	    CONTENTS OF EACH RECORD..................................... 5
	    KEYWORD LISTS............................................... 7
	    RATIONALE FOR A SINGLE KEYWORD FIELD........................ 7
	    TIPS ON SEARCHING........................................... 8
	    DISCLAIMER.................................................. 9
	    PERMISSION TO COPY.......................................... 9
	    THE USER-SUPPORTED CONCEPT.................................. 9
	    CONCERNING FUTURE LETUS A-B-C DATABASES.....................10


			   LETUS A-B-C (tm) USERS GUIDE 	   Page 1.


	Letus A-B-C is a database of articles and letters from magazines
	about IBM Personal Computers.  It was created using PC-File III, a
	general purpose "Data Base Manager" program written and distributed
	by Jim Button under the "user-supported software" concept.  Togeth-
	er with PC-File III (or earlier versions), the Letus A-B-C database
	provides the IBM PC user with a tool for easily performing litera-
	ture searches at a very nominal cost in one's office or home.

	The initial release of Letus A-B-C covers the period 1982 through
	1983 for the following five magazines devoted to the IBM PC:
	Softalk (SOFT), Personal Computer Age (PCAGE), PC Magazine (PCMAG),
	PC World (PCW), and PC Tech Journal (PCTEC).  The database normally
	comes on three double-sided, double density diskettes, with all of
	1982 on a single diskette and with 1983 distributed on the other

	An attempt was made to include every article of each magazine, even
	when the authorship at times was unclear (e.g., magazine editor-
	ials, promotionals, etc.).  Generally each magazine provides its
	own index on a periodic basis, most typically at the end of the
	year or end of the volume, with articles categorized by Subject,
	Author, and Title.  The Letus A-B-C database extends this index
	table method by providing a "keyword" field that can quickly be
	searched with PC-File.	For example, one can search for all of the
	articles that make reference to a particular product or idea (e.g.,
	PC-File, User-Supported Software, etc.).  However, since each mag-
	azine index is by itself quite useful, we have included a "record"
	for each in the Letus A-B-C database (keyword=index).

	Letus A-B-C also contains many "Letters to the Editor", "Questions
	and Answers", "Helpful Hints", etc...........those things that are
	so hard to find when you really need them!  Apropos to this discus-
	sion, the reader might find it amusing that during the period of
	time when we were busily creating Letus A-B-C, a glass of soda pop
	was accidently poured into the keyboard.  A quick PC-File/Letus
	A-B-C search on another PC for the keyword "keyboard" unearthed a
	letter telling how to take the IBM PC keyboard apart, clean it, and
	put it back together again.  Very timely indeed!

	Inclusion of "letters" into the database required a certain amount
	of subjectiveness on our part.	Our general philosophy has been to
	include only those letters that contain information "of value", ex-
	amples being:  maintenance and repair tips, do-it-yourself items,
	bugs and corrections to software and hardware, patches to word pro-
	cessors, programming helps, benchmark calculations, etc.  What we
	purposely tried not to include were:  complaints (or compliments)
	about products, comments on mistakes made in review articles, re-
	buttals, and gossip.


			   LETUS A-B-C (tm) USERS GUIDE 	   Page 2.

	In addition to the keyword field and the identification fields
	(i.e., author, title, magazine issue, and page), we have included
	three lines that give a general, terse description of the article.
	We have NOT commented on the worth or value of any product or idea
	in these lines.  We do give the names of products and, whenever
	possible, the manufacturer since most everybody reads these mag-
	azines for product reviews (over half the articles that appear in
	the IBM PC literature seem to be reviews (or overviews) of hardware
	and software products).


	If you haven't already printed this document, please do so before
	trying to access the Letus A-B-C database with PC-File (or with any
	other program for that matter).  Instructions for printing the doc-
	umentation are given on the labels of the diskettes mailed by us.
	However, you might have a copy of Letus A-B-C that has been copied
	for you by a friend or club, so we will repeat the instructions:

	     1.  "Boot-up" the DOS system and put Letus A-B-C Disk #1 in
		 drive "A".

	     2.  Type A:LETUS (no spaces).  Press the "ENTER" key (do not
		 enter the quote marks, of course).

	We recommend that you read this document in order to gain some
	insight into the organization of the database, as well as obtaining
	ON THEM (assuming, of course, that you are only going to be search-
	ing from these diskettes, not writing onto them).


	In order to search the Letus A-B-C database most effectively, we
	recommend using PC-File III, although earlier versions will work
	almost as well (differences that affect searching on Letus A-B-C
	will be discussed later on).  One can obtain a copy of PC-File III
	directly from Jim Button by sending a diskette and a self-addressed
	stamped mailer to:

				  Jim Button
				 P.O. Box 5786
			       Bellevue, WA 98006

	The remainder of this documentation assumes that you are reasonably
	familiar with one of the versions of PC-File.  [If not, then at
	least study "FINDING A RECORD" from the PC-FILE USERS GUIDE before
	proceeding any further].

	[Note:	The authors wish to express their thanks to Jim Button for
		several helpful discussions and his general support].


			   LETUS A-B-C (tm) USERS GUIDE 	   Page 3.


	The following is intended to be used by those people with two-drive
	systems.  If you have a single-drive system, it might be useful to

	Put the PC-File operation diskette in one of the disk drives (this
	is typically the "A" drive) and enter the drive name followed by a
	colon.	Thus, if the diskette is in the left-side drive, type "A:"
	and press "ENTER" (do not enter the quote marks).  You have now
	established the "default" drive for your system and you should see
	the A> prompt on the screen.

	Next, insert one of the Letus A-B-C diskettes into any other drive,
	such as drive "B".

	Then type "PC-FILE" and press "ENTER".  You are now under the con-
	trol of PC-File.  When prompted with the question "Which drive
	(A-H) for the Database:", enter the letter corresponding to the
	disk drive where the Letus A-B-C diskette has been inserted ("B" in
	this example).	The various files on this diskette, corresponding
	to magazine and year, will be displayed on the screen for your
	selection, and you may proceed with PC-File at your discretion.

	However, if you are confused at this point, or if this is your
	first attempt at using PC-File, it is highly recommended that you
	study the appropriate documentation for that program before pro-
	ceeding.  You may push the "Esc" key one or more times in order to


	Each of the Letus A-B-C diskettes contains three files (per mag-
	azine) that are used by PC-File, and are of the form:

	magazineyear.HDR - Contains information on the field names/lengths,
			   where "magazineyear" mnemonically identifies
			   magazine and year (e.g., SOFT83) [note: suffixes
			   "A" and "B" divide the year (PC Magazine only)].

	magazineyear.INX - The index for this file of the database.

	magazineyear.DTA - The actual data for this file of the database.

	In addition to this document (LETUS.DOC), which is on Disk #1 only,
	there are three files (per diskette) that relate to the Letus A-B-C
	screen-logo or control the printing of the documentation
	(LETUS.BAT, LOGOyear.COM, and PLOGOyear.COM).  Finally, there are
	files containing lists of keyword strings (magazineyear.KEY)
	corresponding to each "magazineyear.DTA" file (we will discuss
	these later on).


			   LETUS A-B-C (tm) USERS GUIDE 	   Page 4.


	Disk #	Filename.Ext  Bytes  Magazine  Year  Mo./Vol.	     #Rec.
	  1	SOFT82.DTA    22784  Softalk   1982   Jun/1	       55
		      .INX     1280		      thru
		      .HDR	128		      Dec/1
		      .KEY     1450
	       PCMAG82.DTA    91392  PC        1982   Feb-Mar/1(1)    222
		      .INX     4992		      thru
		      .HDR	128		      Dec/1(8)
		      .KEY     5724
	       PCAGE82.DTA    39680  PC Age    1982   Mar/1.3  *       95
		      .INX     2176		      thru
		      .HDR	128		      Dec/1.9
		      .KEY     2540
		BYTE82.DTA     2560  Byte      1982   Jan/7(1)		5
		      .INX	256		      thru
		      .HDR	128		      Dec/7(12)
		      .KEY	128
	  2	SOFT83.DTA    94208  Softalk   1983   Jan/1	      230
		      .INX     5120		      thru
		      .HDR	128		      Dec/2
		      .KEY     5738
	      PCMAG83A.DTA    80384  PC        1983   Jan/1(9)	      195
		      .INX     4352		      thru
		      .HDR	128		      Jun/2(1)
		      .KEY     6713
	       PCAGE83.DTA    80896  PC Age    1983   Jan/2.1	      196
		      .INX     4352		      thru
		      .HDR	128		      Nov/2.11
		      .KEY     5789
	  3	 PCW83.DTA    95104  PC World  1983   Apr/1(1)	      231
		      .INX     5120		      thru
		      .HDR	128		      Dec/1(10)
		      .KEY     6830
	      PCMAG83B.DTA   117120  PC        1983   Jul/2(2)	      285
		      .INX     6400		      thru
		      .HDR	128		      Dec/2(7)
		      .KEY     8162
	       PCTEC83.DTA    22528  PC Tech   1983   Jul-Aug/1(1)     53
		      .INX     1280  Journal	      thru
		      .HDR	128		      Nov-Dec/1(3)
		      .KEY     1997
		BYTE83.DTA    18432  Byte      1983   Jan/8(1)	       43
		      .INX     1024		      thru
		      .HDR	128		      Dec/8(12)
		      .KEY     1518

	* Note:  Volumes 1.1 and 1.2 of PC Age, which are out of print,
		 are missing from the Letus A-B-C database.


			   LETUS A-B-C (tm) USERS GUIDE 	   Page 5.


	Each record (i.e., magazine article or letter) in the Letus A-B-C
	database consists of nine fields as follows:

			 Field No.   Field Name   Length
			 ---------   ----------   ------
			     1	     keyword(s)     65
			     2	     author(s)	    45
			     3	     title	    65
			     4	     magazine	     8
			     5	     issue	    25
			     6	     page	     4
			     7	     1st line	    65
			     8	     2nd line	    65
			     9	     3rd line	    65

	A typical example is shown below:

	keyword(s)  company,interview,Microsoft,MS-DOS
	author(s)   A. Tommervik
	title	    "EXEC Microsoft: Young, Old, and Way Ahead"
	magazine    Softalk
	issue	    82/11 Nov v.1
	page	      14
	1st line    Interview with the management of Microsoft, the
	2nd line    company that produced MS-DOS (PC-DOS for the
	3rd line    IBM PC).


	The amount of data that can be placed in each field is limited to
	the "lengths" defined above.  However, PC-File allows the user to
	change these limits (to a maximum field length of 65) or even to
	add and delete fields.	Our choice of fields and lengths was found
	to be adequate for the majority of articles.  On occasion a title
	was too long and it was simply continued into the "1st line", as
	shown in the following example:

	keyword(s)  general,editorial,performance
	author(s)   W. Fastie
	title	    DIRECTIONS - "On the Matter of Performance: What You...
	magazine    PC Tech
	issue	    83/09 Sep-Oct v.1 n.2
	page	      10
	1st line    ...See May Not Be What You Get".  General editorial.
	2nd line
	3rd line

	The magazine, issue, and page were placed in separate fields in
	order to facilitate sorting and merging.  As shown above, the date
	of issue was formatted as "yy/mm",  with additional information
	such as volume, number, and actual month(s) included afterwards.


			   LETUS A-B-C (tm) USERS GUIDE 	   Page 6.

	It was fairly easy, therefore, to sort each set of magazine files
	the way they are presented on the diskettes.  Namely, within each
	magazine-year the records (articles) are in descending order by
	month and ascending order by page number within each month.

	It was anticipated that many users of Letus A-B-C will want to con-
	catenate the various magazine files into one file on a hard disk
	using the merging facilities of PC-File.  After doing this, the
	data can then be re-sorted in any manner the user desires.  We
	elected to group the database into individual files of less than
	160KB so that they could be used on systems with single-sided
	drives, as well as with RAM-drives (for speed).  We sorted first by
	month (descending) and then by page (ascending) because one gener-
	ally wants the "latest" information on a given subject.

	In many cases, as shown in the example above, a "monthly column"
	has been indicated in the title field with upper case letters.
	Other examples that will appear in the database include THE HELP

	A small number of records have no data in the commentary lines.
	In most of these cases the title adequately describes the article.
	Sometimes, however, the article is simply too general or vague to
	warrant any description.

	Quite often a magazine article will contain one or more "insert"
	articles, sometimes written by others.	We have included most of
	the inserts as separate records and have referenced the parent
	article in the insert, and vice versa.	By cross referencing in
	this manner, one is given the opportunity to see articles that
	relate to the parent subject, but might otherwise be missed in a
	search on a particular keyword string.	The following two articles
	serve to illustrate this point:

	keyword(s)  PC-File FAST-SORT,Info-SORT,DBM,bubble,review,insert
	author(s)   J. M. Woram
	title	    "A Review - Of Sorts"
	magazine    PC Mag
	issue	    83/10 Oct v.2 n.5
	page	     549
	1st line    Review of FAST-SORT, Info-SORT, and PC-File.  Also, a
	2nd line    simple bubble sort program (BASIC) is listed.  [Insert
	3rd line    entitled "Survival of the Fittest Program" by J.Button]

	keyword(s)  user-supported,software,free,market,business,money
	author(s)   J. Button
	title	    "Survival of the Fittest Program"
	magazine    PC Mag
	issue	    83/10 Oct v.2 n.5
	page	     554
	1st line    Insert article in "A Review - Of Sorts" by J. M. Woram,
	2nd line    describes the concept of `user-supported software': a
	3rd line    free-market approach to selling software.

	(The connection between these two articles should be obvious).


			   LETUS A-B-C (tm) USERS GUIDE 	   Page 7.


	On each Letus A-B-C diskette there are files, identified by
	"magazineyear.KEY", that contain a sorted list of keyword-strings
	corresponding to the various "magazineyear.DTA" files.  We have
	included these files so that the user can determine whether or not
	a particular keyword that is being looked for actually exists in
	that database file.  The lists also provide the user with "ideas"
	for searching on a particular subject.

	In order to create a list on your printer of any one of these
	keyword files, do the following:

	  1.  Put the appropriate Letus A-B-C diskette into drive "d"
	      (i.e., "A", "B", "C", etc.).

	  2.  Set up your printer.

	  3.  Type "COPY d:magazineyear.KEY PRN" and press the "ENTER" key.
	      (e.g., COPY A:PCMAG83A.KEY PRN if you have Disk #2 in the "A"
	      drive and you want the keyword list for PCMAG83A).


	Selecting "good" keyword-strings for an article or letter can be a
	very subjective thing to say the least.  The task is made somewhat
	easier if the database management program has the capability of
	searching on substrings (i.e., it is "tree-structured").  We could
	have set up this kind of system with PC-File, more or less, by in-
	cluding one or more sub-keyword fields.  The disadvantages of this,
	however, are:

	   1.  The database would take up more memory.
	   2.  Multiple field searching would take more time.
	   3.  Using the FINd command from the "MASTER MENU SCREEN" of
	       PC-File would have required multiple passes through the
	       database, which would have been tedious as well as slow.
	   4.  The alternative approach of using the LISt command, to-
	       gether with the "multiple comparison" capabilities of
	       PC-File, would also have been slow.

	The single keyword line system that we chose requires that the key-
	words be chosen rather carefully.......but the system is reasonably
	fast and the user can, as a result, keep trying various words in
	order to find an article.  If the user is not successful at first,
	then the keyword lists may prove to be of value.

	In any case, the user is at liberty to modify the Letus A-B-C data-
	base or to clone it to some other form (e.g., additional keyword
	lines or a personal keyword system).


			   LETUS A-B-C (tm) USERS GUIDE 	   Page 8.


	1.  It is better to choose a subset of a word.	For example, when
	    looking for the word "printer", use "print" instead.

	2.  Be aware of the fact that many of the word-strings in the com-
	    puter world are composite strings made up of a mixture of upper
	    and lower case alphabet letters, plus numbers, plus funny sym-
	    bols, plus super- and subscripts, plus..........etc. etc. etc.

	3.  PC-File III treats upper and lower case equally.  This is very
	    important since words like "PC-TALK" and "PC-talk" will both be
	    found in a search for "PC-Talk".

	4.  If you are using an earlier version of PC-File, you will need
	    to be aware of the various upper/lower case spellings of some
	    words (check the appropriate keyword list carefully).

	5.  If you cannot find an article by searching the keyword field,
	    try searching in the 1st, 2nd, or 3rd lines.

	6.  The "letters" contain many items, probably too many to make a
	    keyword list even feasible at times.  In order to make it
	    fairly easy to locate these types of records, we have used the
	    keywords "help" and "Q&A".  Furthermore, the word "help" is
	    always left-justified in the field so that a much faster search
	    can be made (i.e., compared to searching on ">help").

	7.  The strings "help" and "Q&A" also occur in the keyword fields
	    of the regular articles, as well as in the "letters".  The only
	    advantage for searching on "help" instead of ">help" is that it
	    significantly speeds up the search.  If you only are looking
	    for a "Letter to the Editor" or "Questions and Answers" column,
	    you can take advantage of the increase in speed.

	8.  Be aware of the fact that an article (usually a "letter") can
	    span several records.  For example

	keyword(s)  help,Q&A,Spanish,symbol,snow,color,SYSTEM,Apple,DIF,file
	author(s)   M. Zachmann
	title	    PC TUTOR
	magazine    PC Mag
	issue	    83/12 Dec v.2 n.7
	page	     636
	1st line    1)Spanish symbol/NEC printer, 2)Avoiding "snow" with color
	2nd line    adapter, 3)Getting BASIC back after issuing SYSTEM, 4)DIF
	3rd line    file interchange/Apple & IBM... continued to next record..

	keyword(s)  help,Q&A,4164,chip,speed,calendar,computer log,NEC,print
	author(s)   M. Zachmann
	title	    PC TUTOR
	magazine    PC Mag
	issue	    83/12 Dec v.2 n.7
	page	     636
	1st line    ...cont. from previous record..5)4164 chip speed, 6)Obtain-
	2nd line    ing day of week from calendar date, 7)Program to keep log of
	3rd line    computer usage, 8)Overprinting underlines/NEC printer.


			   LETUS A-B-C (tm) USERS GUIDE 	   Page 9.


	This database and associated documents were developed solely by the
	Authors, Walter Ralph Nelson and Randall Eric Nelson.  They make no
	warranty, expressed or implied, or assume any liability or respon-
	sibility for accuracy, completeness or usefulness of any informa-
	tion, apparatus, product or process disclosed, or represent that
	its use will not infringe privately-owned rights.  Mention of any
	product, its manufacturer, or suppliers shall not, nor is it in-
	tended to, imply approval, disapproval, or fitness for any partic-
	ular use.  A royalty-free, non-exclusive right to use and dissem-
	inate this database and associated documents for any purpose what-
	soever is expressly reserved to the Authors.  In no event will the
	Authors be liable to you for any damages, including any lost pro-
	fits, lost savings, or other incidental or consequential damages
	arising out of the use of or inability to use this database, even
	if the Authors have been advised of the possibility of such dam-
	ages, or for any claim by any other party.


	Clubs and other non-profit organizations are granted permission by
	the authors to freely copy this database and documentation and
	share it with their members, so long as:

	1.  No price is charged for the database or documentation.  However,
	    a distribution cost may be charged for the cost of the diskette,
	    so long as it is not more than $10 total.

	2.  Club members are informed of the user-supported concept and
	    encouraged to support it with their donations.

	3.  The database or documentation are not modified in any way and
	    are distributed together.


	User-supported software is an experiment in distributing computer
	programs and databases, based on these beliefs:

	1.  That the value and utility of software is best assessed by the
	    user on his/her own system.

	2.  That the creation of personal computer software can and should
	    be supported by the computing community.

	3.  That copying of programs and databases should be encouraged,
	    rather than restricted.

	Anyone may request a copy of a user-supported program or database
	by sending blank, formatted disk(s) to the author.  An addressed,
	postage-paid return mailer must accompany the disk(s) (no excep-
	tions, please).  A copy of the program or database, with documen-
	tation on the disk(s) will be sent by return mail.  The program


			   LETUS A-B-C (tm) USERS GUIDE 	   Page 10.

	will carry a notice suggesting a contribution to the author.
	Making a contribution is completely voluntary on the part of each
	user.  Free distribution and voluntary payment for its use elimi-
	nates costs for advertising and copy protection schemes.

	Users obtain quality software at reduced cost.	They can try it out
	before buying, and do so at their own pace and in the comfort of
	their own home or office.  The best products will survive, based
	purely on their quality and usefulness.

	Please join the experiment.

	If you believe in these ideals, your contribution is solicited to
	help make them work.

	|								    |
	|  You are encouraged to copy and share this database with others.  |
	|	      your contribution will be appreciated.		    |
	|		  ($10 per diskette is suggested)		    |
	|								    |
	|			    R. NELSON				    |
	|		  3790 El Camino Real, Suite 2006		    |
	|			Palo Alto, CA 94306			    |
	|								    |
	|      However, regardless of whether you make a contribution,	    |
	|	 you are encouraged to copy and share this database.	    |


	1.  It is our intention to provide future updates to Letus A-B-C
	    under the USER-SUPPORTED SOFTWARE concept (on an annual or semi-
	    annual basis).

	2.  In addition, because we have received requests for such a service,
	    the Letus A-B-C database for 1984 will be automatically mailed to
	    anyone who subscribes with a prepayment as follows:

		Monthly diskette..............$15/month (or $150/year)
		Quarterly diskette............$20/quarter

		(We supply the diskettes, mailers, and postage).

	For those of you who want to initiate payment through your company
	accounting system, or wish to have an invoice for tax purposes, the
	following invoice is provided.



	Purchased from:    R. NELSON
			   Letus A-B-C
			   3790 El Camino Real, Suite 2006
			   Palo Alto, CA 94306

	 DATE:	   /   /			    Invoice No. 8401-001

	 Letus A-B-C database diskettes 	 3	 $10	   $30 *
	 for 1982 & 1983 (covering Byte,
	 Softalk, PC Tech Journal, PC Age,
	 PC World, and PC Magazine).

					* $40 if we provided diskettes,
					  mailer, and postage.

		  | Please make check payable to:  R. NELSON |

	Note:  You may retain this Invoice for your tax records.
	       Payments sent from within the State of California
	       require an additional 6% to cover state and local
	       sales tax (License No. SR GH 19-690581).


Directory of PC-SIG Library Disk #0121

 Volume in drive A has no label
 Directory of A:\

BYTE82   DTA      2560   1-27-84  10:19p
BYTE82   HDR       128   1-27-84  10:18p
BYTE82   INX       256   1-27-84  10:19p
BYTE82   KEY       336   1-27-84  10:20p
CRC      TXT      1499  11-09-84   2:54p
CRCK4    COM      1536  10-21-82   7:54p
LETUS    BAT        45   1-28-84   6:00p
LETUS    DOC     28194   1-29-84   3:53p
LOGO82   COM      2132   1-28-84   6:39p
PCAGE82  DTA     39680   1-27-84  10:15p
PCAGE82  HDR       128   1-27-84  10:14p
PCAGE82  INX      2176   1-27-84  10:15p
PCAGE82  KEY      2540   1-27-84  10:16p
PCMAG82  DTA     91392   1-27-84  10:24p
PCMAG82  HDR       128   1-27-84  10:22p
PCMAG82  INX      4992   1-27-84  10:24p
PCMAG82  KEY      5724   1-27-84  10:13p
PLOGO82  COM      2132   1-28-84   5:45p
SOFT82   DTA     22784   1-27-84   9:57p
SOFT82   HDR       128   1-27-84  10:06p
SOFT82   INX      1280   1-27-84   9:57p
SOFT82   KEY      1450   1-27-84  10:03p
       22 file(s)     211220 bytes
                       96256 bytes free