Users unfamiliar with the University of Pennsylvania Medical School BASIC are advised to inspect DOC:BASIC.MEM before using it. Existing BASIC programs should run unchanged. This release (1/4/80) contains numerous bug fixes and a few new features. Of these the more important are: 1) All messages are in upper/lower case. 2) MAT INPUT will input both string and numeric matrices. 3) The error message: ? Out of static list space in line N is given whenever string manipulation tables are in danger of overflow. 4) The function LL() returns the integer value of its argument, which must be an ambiguous constant equal to a line number in the program. RESEQUENCE recognises it as a line number. It is intended for use in testing the ERL variable.