T1EXPL.TUT Tutorial which explains TUTOR.COM (version 4.50). T2KEY.TUT A description of the expanded keyboard. T3HIST.TUT Brief history of computers. T4TERM1.TUT Introduction to computers, binary numbers and the CPU. T5TERM2.TUT Introduction to storage and input/output devices. T6DOS1.TUT Disk Operating System operation and commands. T7DOS2.TUT A tutorial on subdirectory structure and commands. T8BATCH.TUT Batch file commands and structure explained. T9PROG.TUT A brief introduction to structured programming.