File Number AUTO 5/8/05. Trials of UNI-POP/4120 from March 1968. Correspondence file. POP-2 Reference Manual, by R.M. Burstall and R.J. Popplestone. Copy No. 92, March 1967. Memorandum MIP-R-81, POP-2 in POP-2. Machines independent POP-2 compiler by R.J. Popplestone and R.D. Dunn, October 1970. POP's "Book", copied at Dept. Machine Intelligence and Perception, Hope Park Square, Edinburgh, February 1968. Report: A plain Man's Guide to Multi-POP Implementation by D.J.S. Pullin, Department of Machine Intelligence and Perception, University of Edinburgh. POP2 in POP2, Copy No. 1.