A mainframe assembler and disassembler for your Linux,Mac, Windows computer - M236
Mainframe assembler syntax checker - M226
Z390 Portable Mainframe Assembler and Emulator
you can learn assembly in 10 minutes (try it RIGHT NOW)
Mainframe tools for MS-DOS - M231
Comparing C to machine language
The PL/S Programming Language And Compiler - M238
The Best Way To Learn Reverse Engineering
Emulating a Mainframe zSeries on Apple M1
Z390 Interactive Debugger
[011] MVS 3.8: Installation/Sysgen Pt. 5 - Completing Our New System
Sorting with GnuCobol Sort - M239
Passing parameters to a PL/I program - M208
Mainframe quiz - Win an IBM S/370 mainframe! - M100
Zero to mainframe Cobol in 5 minutes - M223
MVS 3.8 or z/OS? MVS gives you all the fun and none of the legal trouble - M175
1.11 BS2000 Part 1 Inside the SE Infrastructure Thomas Dietz
Hello world in the mainframe RPG language on MVS - M126
MVS Tk4 - COBOL program calling an Assembler program
Programming in C on IBM MVS 3.8 TK4 - M63