Alan Turing is finally being honoured for his work, with a statue in Manchester. There’s an interesting follow-up mail from Mike O’Dell there, too: “the notes go on at length about the need for subroutines, subroutine libraries for common functions, and he even invented debugging and the concept of a debugger program. he also described what we today called a relocating assembler and linker – inventing the whole notion of “relocation” as an “obvious” aside.”