I was going thru a bunch of old material and I ran across this IBM manual that I had squirrelled away from a garbage find in the early 80s that also included a bunch of Bytes. It's a 6th edition (Mar 79) and says it applies to Release 4 of OS/VS1, Release 3 of OS/VS2 ,Release 2 of VM/370, DOS/VSE, and all other releases A descrptive heading says "This manual describes the OS/VS -DOS/VSE- VM/370 assembler language. It's a 450 page XEROXed copy. I know ziltch about non-micros and am wondering if this is of any value (in the intellectual sense) ? ciao larry lwalker(a)interlog.com