SQUOZE

IBM's SQUOZE was a representation of a relocatable program object file with a symbol table on punched cards in the SHARE 709 operating system. A program in this format was called a SQUOZE deck.

Identifiers in the symbol table were represented in a 50-character alphabet, allowing a 36-bit word to represent 6 alphanumeric characters plus 2 flag bits, because 50 < 2.