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DAYBREAK Simple Algebraic Equations Grade: 7-12 III/4 Description: Clear, step-by-step instructive examples show how the basic variables X and Y function in algebraic expressions. Tutorial exercises teach the evaluation process and use bold graphic rewards to positively reinforce correct answers. The program logically leads students to successful manipulation of the X and Y concepts. Hardware Requirements: Disk. Support: Daybreak Software. 90-5176 39.95

LIBRARY 100 The LIBRARY 100 from TBS is without doubt the greatest software bargain ever. Released in November 1978, it has sold thousands in 44 countries. Written for the TRS-80, LIBRARY 100 contains 100 programs on five tapes. Most of the programs can be run on a 4K, Level II computer. Designed to be a basic computer library, it provides a series of programs over a broad range of topics. All programs but one are written in BASIC and can easily be modified to suit your own purposes. 'The program mix is eclectric, interesting, and curious If I had a Level II TRS-80 and one or more grade-school children, or if I were a hardcore software collector, or if I had little software and wanted to get a lot of it with a minimum of bother, I'd buy the Library 100.' Stephen Gray, Creative Computing, April, 1979. ' a basic computer library for the hobbyist, parent or businessman.' Kilobaud Microcomputing, December 1978. The programs are spread over five general categories; Finance, Education, Graphics, Home and Games. As an added bonus, the LIBRARY 100 contains Tiny PILOT, a condensed version of the high level language primarily used in education. It is perfect for teachers, parents, students and sales trainees. Using only six commands, even a child could be programming in minutes. The other programs are as follows: FINANCE: Present Value of Future Sum, Simple Interest for Days, Future Value of Present Sum, Amortization Schedule, Interest Rate-Compound Interest, Interest Rate-Installment Loan, Days Between Dates, Term of Installment Loan, Present Value of Series of Payments, Real Estate Investment Analysis, Nominal-Effective Interest, Internal Rate of Return, Future Value, of Regular Deposits, Regular Deposits for Future Value, Depreciation (Amount, Rate, Salvage Value, Schedule), Bond Present Value, Bond Yield to Maturity, Sale-Cost-Margin-Day of Week, Moving ad. EDUCATION: Multiplication & Division, Addition, Subtraction, Fraction & Decimal, States & Capitals, States and Order of Entry, States and Date of Entry, States and Abbreviations, Inventors and Inventions, World Capitals & Countries, Urban Areas and Population, Authors & Books, Presidents and Order, States and Largest City, Base Numbers. GRAPHICS: Front Cover, Wierd, Rat Race, Random Ad, Fireside, Left-Right Ad, Blocks, Herring, Launch, Blinker, Snoopy, Snow, Step Ad, Step Ad Two, Graphic Words, War Games. HOME: Bartender, Nutrition, Conversion, Perpetual Calendar, Base Conversion, Calculator, Vacation Check-off List, Telecode, Message Board, Night Check-off List, Expense Account, Babysitter, Drunkometer, Remember, Christmas List, Mileage. GAMES: Jumble, Search, Memory Quiz Letters, Sting Ray, Russian Roulette, Wheel of Fortune, Towers, Decision, Memory Quiz Numbers, Doomsday, Star Trek, Sketch, Flipper, Life, Fifteen, Speedy, Count, Road Race, Stars, Odd One, Spy Ship, Horse Race, Scissors, Craps, Star Blazer, Tiger Shark, Unjumble, Mind Reader, Roach Race, Jumble 2, Gypsy. The price for the LIBRARY 100 is only $49.50. That's less than $.50 per program. Join the thousands of users who are already enjoying this exceptional software package. Only from TBS. (We are currently working on a Library for the APPLE.) TBS has other great software for your TRS-80. CHECKBOOK II, INFO SYSTEM, & EXERCISER are general applications. BASIC TOOLKIT, SYSTEM DOCTOR & TERMINAL CONTROL are systems utilities. BUSINESS MAIL LIST, DATA MANAGER, CHECK REGISTER ACCOUNTING SYSTEM & ANALYSIS PAD are strong applications for business. TBS also has DISK HEAD CLEANERS for TRS-80 and APPLE and GRAN MASTER DISKETTES, the best on the market. TBS is YOUR COMPANY, and to you we pledge to produce quality software at a price you can afford. The above products are available NOW at Computer Stores and Associate Radio Shack Stores nationwide or directly through us. For more information please contact us at the numbers below. Paramount Pictures, Corporation. THE BOTTOM SHELF, INC. (404) 296-2003 751 DeKalb Ind. Way Decatur, GA 30033

SIMPLE SORT What are the best qualities of a sorting utility? The sort must be fast. (Simple Sort is written in Z-80!) The sort must be efficient. (Simple Sort occupies less than 3K of machine code and requires less than 1K for buffers!) The sort must be kind to the diskette. (Simple Sort does all its sorting in memory, with a minimum of reads and writes!) The sort must not use any extra storage space. (Simple Sort does not require any intermediate files!) The sort must be easy to use. (Simple Sort only needs to know the bare particulars!) Simple Sort -it's easy, it's fast and it's efficient! The perfect answer for single drive owners, and great for dual drive owners who prefer to use formatted-only diskettes! $79.95 on diskette with manual.

SIMPLROOTS ENABLES YOU TO BEGIN AND USE A GENEALOGY OF NAMES. GENEALOGY MAY BE PRINTED AND SAVED ON DISK OR TAPE. 100 NAMES WITH 16K LEVEL II TO 500 NAMES WITH 48K DISK. FOR TRS-80 MODEL I $9.00. SENT ON DIGITAL CASSETTE RECORDED ON BOTH SIDES. RETURN CASETTE FOR FULL REFUND IF UNSATISFIED. THE SIMPLSOFT WARE COMPANY RT. 4 BOX 216 SYLVANIA GEORGIA 30467 SPECIFY LEVEL II OR DISK. VISA/MASTERCHARGE ACCEPTED.

Simput UTILITY PROGRAM FROM HIKARI GROUP SIMPUT is a flexible random access program for TRS 80 Model I that lets you manage extremely complex data with great simplicity. It allows you to create records from one byte to more than 85,000 bytes long, with as many subrecords as you need, and it can be used with Microsoft's Basic Compiler. SIMPUT has been tested to be compatible with TRSDOS (can be compiled), DBLDOS (also can be compiled), NEWDOS+, NEWDOS 80, NEWDOS 80 V.2, and NEWDOS 80, with Double-Zap/II Available on Disk $29.95 (206) 382-6632 TRS 80 MODEL I, TRSDOS TMS, TANDY CORP, DBLDOS TM, PERCOM DATA CO., NEWDOS+, NEWDOS 80, NEWDOS 80 V.2 TM'S, APPARAT, INC., DOUBLE-ZAP/II TM, SOFTWARE, ETC Hikari Group 3032 Fourth Avenue West Seattle, Washington 98119

SIMULATED COMPUTER This program graphically simulates the internal operation of a small computer. Students can input and run programs, seeing the results of each operation and how it is logically interpreted inside the computer, right on the screen. The program displays messages describing what it is about to do, and provides descriptive error messages. A five-lesson tutorial and reproducible manual are included. Available on 32K disk for the Apple II; and on 16K cassette for the TRS-80 and Atari. ' a great introduction to the concept of a microprocessor.' - CREATIVE COMPUTING. 3M-T04 Simulated Computer (TRS-80) $29.95

NEW SOFTWARE for TRS 80 Model III Single Entry Ledger designed as an uncomplicated control of finances for home or small business. Add, delete, edit at any time. Compatible with DBM. Only $95 Write or phone for complete software price list. 2457 Wehrle Drive Amherst, NY 14221 716/631-3011

WE MEAN BUSINESS! BUSINESS SOFTWARE, THAT IS USE YOUR FOR MORE TRS-80 THAN FUN AND GAMES SIR ECHO $10.00 A handy program to make your printer work like an electric typewriter. Use alone or merge with your programs to make what appears on the screen echo to the printer. Supplied on cassette. User group discounts available. Dealer inquiries invited. TRS-80 is a trademark of the Tandy Corp. TERMS: Check, money order, Visa, Mastercharge, Washington residents add 5.3% for tax. THE PERIPHERAL PEOPLE P.O. Box 524, Dep't. M Mercer Island, WA 98040 43 (206) 232-4505

SIR - SELECTIVE INFORMATION RETRIEVAL SIR is written by Gordon Hatton who wrote Instant Sort Search, which is described on page 31.1 of this catalogue. If you are not familiar with ISS, it may well be of use if you turn back the pages and read the description; not because the present program is an update or upgrade of ISS, but because SIR is so big a database concept that it is required a sort written for it and what better than the ISS concept which has proved to be a Benchmark for fast sorts. SIR is not only a database but a new approach to database structure. Up until now, there have been two important categories of databases, one planar and the other relational. The former is the original type of database written for microcomputers. Everything in a planar database is held in one level. The base is split up into records and the records into fields. It is entirely structured. Although one can Search, Sort, Edit and so on, using the contents of a field as a key, one cannot cross the single layer boundary of one single layer to another. A relational type database is non-planar. Each field is kept as a separate record. Perhaps the name is one, the address another, occupation another and so on. One file contains all the names, another all of the occupations. The database is constructed by linking this data together. The advantage of this is self evident. One is not restricted to a particular record. The data is stationary, the links are moveable. But now SIR has come along creating yet a third concept. SIR is to data what Visicalc is to numeric information. SIR has a number of similarities and might be described as an electronic analysis book. Just as in Visicalc, the screen is a window on a large matrix or spreadsheet, so SIR provides a window on to an enormous analysis book. With SIR we are dealing with data which is normally alphabetic - but may be numeric, rather than the reverse. The data in the analysis book may comprise an entire disk. The great drawback of an 8 bit microcomputer, namely that far more data can be stored onto the disk than can be brought into RAM, is overcome by SIR. With the advent of the 16 bit machines, this problem is slowly disappearing but until recently all microcomputers were restricted to some 30 or 40K of RAM in the machine, yet could access hundreds of thousands of bytes on the disk. Supposing one has a written analysis book used as a record book; an executive would pull out a pad and jot down the entries in the columns that are relevant to his application. Suppose, for instance, the first column is for name and then 15 columns of information are needed to record sex, age, branch, salary and so on. If our hypothetical executive is interested only in knowing the names of people who fit certain categories he may sit at his desk, run his finger across each name, check each column and jots down on a sheet of paper the name, sex, salary and so on. This is precisely what SIR does. From the database (which can fill an entire disk) it will (in a manner similar to ISS) effectively construct a sub-set database fulfilling the criteria which he has decided upon. This is a big idea and is tremendously powerful. For once the selection has been made - and remember this is a sub-set, we are not now dealing with the main database, we have now selected from it what we want - our executive has full powers of manipulation; in particular the fantastically fast Sort previously mentioned, the ability to printout, delete, amend and so on. In many respects SIR is similar to the relational database. SIR comes with a demonstration staff file database on the disk. SIR is just as happy (and efficient) at constructing a file about branches - who works in which branch, how much they earn and so on - as a file about categories, who falls into which, in which branches are they found, job categories etc. The examples that one could mention are literally endless. A customer file may contain columns for sales 'regions', 'representative', 'total orders in the last three months'. From this SIR can produce a list of inactive accounts analysed region by region, representative by representative and each representative's accounts in alphabetical order. The power of SIR is that all the user has to do is select the columns he is interested in and he effectively has a sub-set database upon which he can carry out any manipulation. There are probably millions of permutations in column selection. There are very few restrictions in the program. The most important is that a database in size cannot exceed one 40 track disk in single density on the Model I and in double density on the Model III. If this is considered to be any sort of a drawback, then the database can be split up into subject categories by the user. Obviously the further restriction of the amount of RAM available is true but in actual use this is not considered to be penalty. One has in excess of 30K to play with an one is talking about the window or sub-set, not the entire database. We must make it clear that SIR is not an update to ISS. Hence, there are no update privileges available to present owners of ISS. However, Mr Hatton has been kind enough to supply us with a Basic utility which will enable owners of ISS to upgrade their disk files for use in SIR. This is provided free on the distribution disk. One other small bonus is that SIR files are straight ASCII and can be manipulated by most word processors. Memory Requirement 48K TRS-80 Disk Model 1 & 3 SYSTEM-80 Disk Mark I & II TRS-80 Disk Model 4 in Model 3 Mode

Hardware tester utility.

SIX2XTND(C) extends TRSDOS(R) 6.2.X past 1987 to 2099. No hidden protection. Money back guarantee. Send $14.95 US. $3 S&H. Check or money order to: Michael Jacobs, Box 552, Stn. K, Toronto, Ontario, Canada M4P 2G9. JA