Abstract: The method of presenting events such as audio and video instructions to a computer user including the recording instructions in the form of an audio soudtrack 15 on a recording tape 10, assigning coded indicia 16 to the various instructional events of a computer program recorded in a memory 31 and recording the coded indicia and instructional events in a table lookup 29, recording a mulitplicity of each indicia on the recording tape adjacent the soundtrack portion the computer program event is to occur, and reading back the recording tape while feeding the audio signal to an audio output 36 and the indicia signal to the table lookup to cause the events or instructions to occur in synchronism.

Abstract: An extended memory system includes a processor, a plurality of input/output devices, a real memory having first and second portions thereof, the first portion storing a system operation program and the second portion storing a plurality of user programs. The processor produces logical addresses when executing user programs or input/output routines, which logical addresses are translated to real memory addresses by one of two first translation memories. System operation instructions common to all user programs are stored in a low order address portion of the real memory. Different user programs are mapped into mutually exclusive portions of the real memory by means of the two translation memories.