SHARER, a time sharing system for the CDC 6600

A time sharing system embedded within the standard batch processing system for the CDC 6600 is described.The system is general purpose and file-based, providing facilities for file input, manipulation, editing, compilation, and conversational execution.It uses a simple scheme for system extension for a machine with only one relocation and memory bound register.No attempt was made to use reentrant code, or to simulate segmentation or paging.Implementation time was approximately six man-years, with the majority of the code being written in FORTRAN.