Atlas Basic Software: Hartran System
Ian Pyle, Barbara Stokoe, Bart Fossey, Paul Bryant, Brian Chapman
Harwell 1961: Decision to write a Fortran Compiler for Atlas
Write it in Fortran
Also BAS: Binary and Arbitrarily Symbolic Loader
Extended Fortran II Compiler (EFC, say) written in Fortran producing code for Atlas
Run EFC through Fortran Compiler on the 7090 at Risley, generating code for Atlas (EFCB)
Run EFC through EFCB on Atlas and you have a new version of the compiler code
Innovative use of the Fortran I/O system to do syntax analysis
