This tape is labeled:

Processor Technology Corporation; BASIC/5

It contains:

BASIC B 0000 19B9
MTCHS B 1AD9 034D
LUNAR B 1AD9 0953
BASIC B 0000 19B6
MTCHS B 1AD9 034D
LUNAR B 1AD9 0953

This is the second (of three) basic interpretors PT produced.  It is 
basically the first with fixes.  It is fast and the math wasn't bad.  The 
main flaw was that it did not support string variables but it did allow 
system calls to machine code, with argument passing, that did allow some 
games to become really spiffy.