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GUESS THE RULE/PLOT Two valuable programs for the mathematics student. GUESS THE RULE presents an algebra guessing game; the object is to guess the computer's secret equation, with hints provided by ordered pairs that will satisfy the equation's solution set. Features eleven levels of difficulty. The second program, PLOT, displays the graph of any function you choose, including simultaneous equations and conic sections. Includes detailed classroom suggestions; available for the Apple II and the Atari with 32K and disk, and the TRS-80 with 16K and cassette. ' a very exciting program which should be in every algebra and analytic geometry classroom.' - THE COMPUTING TEACHER. 3M-T03 Guess the Rule/Plot (TRS-80) $29.95

Educational Game Programs Galactic Guardian and Guillotine are additional activities to supplement the Individual Study Center from TYC Software. Galactic Guardian presents questions and answers in a space game format. The student is asked to save the galaxy from invading spacemen by correctly responding to questions on the Subject Data Tape. Guillotine is a variation of the game hangman. The student's job is to save the man on the screen by correctly answering the questions presented. Both programs are on a single cassette, and can only be used with the Individual Study Center's Subject Data Tapes. The programs are for 16K TRS-80. For more information contact TYC Software, 40 Stuyvesant Manor, Geneseo, NY 14454.

TRS 80 Model I or III (16k) Music at your fingertips for all ages GUITAR PRIMER 80 Pitch pipe Chord menu Tuning Beginner songs Chord exercises Music A-Z GUITAR PRIMER 80 (tape) $ 14.95 OUTSIDE CONTINENTAL USA OR COD ADD $3.00 BOTH TAPES WILL TRANSFER TO DISC PLEASE SPECIFY MODEL I or III Check Money Order Visa Master Charge COD 100 Milbrae Ave. Suite 3 P.O. Box 969 Milbrae, CA 94030 (415) 6977639

CASSETTE SOFTWARE FOR TRS-80 MODEL III AND MODEL I Entertainment and Educational Software Gunfighter. Wild West shootout game for two players. With sound. 26-7953 12.95

CASSETTE SOFTWARE FOR TRS-80 MODEL III AND MODEL I Entertainment and Educational Software Gunfighter. Wild West shootout game for two players. With sound. 26-7953 12.95

CASSETTE SOFTWARE FOR TRS-80 MODEL III AND MODEL I Entertainment and Educational Software Gunfighter. Wild West shootout game for two players. With sound. 26-7953 12.95

DESTROY ALL SUBS/GUNBOATS/BOMBER This package of three programs is fun for the whole family. Included are: . Destroy All Subs-Hunt down enemy subs while avoiding mines and torpedoes. A one-player game. Gunboats-Try to blow the enemy's ship out of the water. For one or two players. Bomber-Carefully release your bomb to destroy the moving submarine. A one-player game. To enjoy these programs, you'll need a TRS-80 Level I 4K. Order No. 0021R $7.95. Instant Software Inc. Dept. 70B0 Peterborough, N.H. 03458 USA

Battle Games Cassette CS-3012 $11.95 4 Programs Requires 16K GUNNER. Destroy enemy aircraft with your anti-aircraft gun. SUB HUNT. Pursue and destroy a computer-controlled submarine. TANK BATTLE. Two players battle it out in this real-time graphic game. GETACROSS. Evade the enemy in this real-time, sound game. This game will not work on the Model III.

Guns of Ft.Defiance From the watchtower, you must direct your men against advancing infantry, cavalry and artillery. --- ---

Guns of Ft.Defiance From the watchtower, you must direct your men against advancing infantry, cavalry and artillery. --- ---

Guns of Ft.Defiance From the watchtower, you must direct your men against advancing infantry, cavalry and artillery. --- ---

BASIC GW CONVERT Model 4/4P ONLY (list $99.95) $89.50 --- ---

Oh, smelly sox - find your lost clothes in Gymnasium Adventure (by John R. Olsen). This is a funny rendezvous with the sights (and smells?) of high school physical education. You can use one letter abbreviations to move or look (ie: N for GO NORTH) or 3 letter abbreviations for actions (ie INV for INVENTORY or OPE DOO for OPEN DOOR). P.S. It really pays to LOOK at things...

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