Found these amongst Linux 'fortunes': PIC Punch Invalid Card POPI Punch Operator Immediately PVLC Punch Variable Length Card RASC Read And Shred Card RPM Read Programmers Mind RSSC Reduce Speed, Step Carefully (for improved accuracy) RTAB Rewind Tape And Break RWDSK Rewind Disk RWOC Read Writing On Card SCRBL Scribble to disk (faster than a write) SLC Search for Lost Card SPSW Scramble Program Status Word SRSD Seek Record and Scar Disk STROM Store in Read Only Memory TDB Transfer and Drop Bit WBT Water Binary Tree