Compute! Issue 11 - April 1981. The Editor's Notes - An Interview with Dr. Chip - Computers and Society - The Beginner's Page Part Two - Access to Resources - An Applications Commentary: Stimulating Simulations - The Commodore VIC-20: A First Look - Advice to PET Owners: How to be a VIC Expert - Basically Useful BASIC: Ascending/Descending Sort - Program Compactor - The Mysterious and Unpredictable RND Part 4: Create an Adventure - Micros with the Handicapped - Matrix Row Operations: A Mathematics Classroom Teaching Aid - A Floating-Point Binary to BCD Routine - Resolving the Applesoft and Hires Graphics Memory Conflicts - Fill the Screen With Your Message: Generating Large Multi-colored Characters using Apple Low-resolution Graphics - Decrementing the For...Next and Endless Loops - Super Cube - Printing Characters in Mixed Atari Graphics Modes - Invaders from Outer Space:An Atari Program Using One Joystick - Unleash the Power of Your Atari CPU - String Arrays in Atari BASIC - Reviews: Atari Super Breakout and Others - Speeding up the Player-Missile Demo - OSI CIP Control Functions - Double the Cassette Baud Rate of your OSI Superboard II/1P - Review: HEXDOS 2 - Partition and Load - Relative File Mechanics - Odds and Ends - COPLOT - ROM Expansion for the Commodore PET - Working with Basic 4.0 - Review Papermate Word Processor - Disabling the STOP Key - Dissecting C. W. Moser's ASSM/TED 1.0 - PET File I/O and Machine Language - How to Get Started in Machine Code And Not Go Crazy With a Routine for Two Joysticks - Machine Language: The Wonderful Wedge - The Single Board 6502 - KIM Tidbits: Expanding Your System - Printing a Symbol Table for the AIM-65 Assembler - New Products WordPro Plus Packages For Commodore Computers - New Products June Workshops Announced - New Products SYBEX Announces The Pascal Handbo - New Products Clock/Calendar Feature Dropped From Apple III Personal Computers - New Products New 6502-Based Single Board Computer - New Products New VP Marketing At Atari's Computer Division - New Products - New Products Atari Memory Boards - New Products Educational Software Announcement - CAPUTE! Corrections/Clarifications.