Features p.36 Logo for Personal Computers [author Harold Nelson] A preview of the first small-computer versions of this exciting language. p.46 Build a Low-Cost Speech-Synthesizer Interface [author Steve Garcia] The Digitalker integrated circuits from National Semiconductor can easily give your computer a limited spoken vocabulary. p.72 Mathematical Modeling: A BASIC Program to Simulate Real-World Systems [author Randall E Hicks] A Compucolor II BASIC program effectively simulates a physical system through the solution of a system of linear differential equations. p.110 A Computer-Based Laboratory Timer [author John Gibson] Accurate, repeatable tine measurements can be made in rapid succession, and logged for later use. p.216 CP/M: A Family of 8- and 16-Bit Operating Systems [author Gary Kildall] An overview of Digital Research's operating systems, including a 16-bit operating system. p.248 The UNIX Operating System and the XENIX Standard Operating Environment [author Robert Greenberg] An inside look at a large-computer operating system implemented for use with microprocessors. p.268 The Ins and Outs of CP/M [author James Larson] Directly access the I/O and disk access functions of…