A volume four LEO III user manual including amendments for different years. The volume was originally comprised of five parts, in this volume, the first three parts have been merged together as part one, with four and five as they were.

• Part 1
  • General Description of the Master Programme
  • General Description of Programme Trials System
  • Master Programme Specification.
• Part 4
  • Programme Trials System Specification
• Part 5
  • Associated Programmes.

Part 1 contains:

• The Input/Output Control Routines
• Overflow Alarm
• Lockout Alarm
• Log Routines
• Operator intervention Routines
• Priority control Routines
• Allocating Procedures
• The Abandon Routine
• Store Dump Routine
• Appendices.

Part 4 contains:

• Purpose of Program Trials System
• Submission of Trial Data
• Processing Carried out by the Intercode Translator
• Trials Set-up Routines
• Overlay and Post-Mortem Routines
• Trials Results Routines
• Operational Aspects
• Appendices.

Part 5 contains:

• Master Programme Input Sequences
• Magnetic Tape Sentinel Production Programme

Provenance :
Collected by John Daines and donated to the LEO Computers Society