”Objects Produced by FACOM 230-60 FORTRAN”

There are three different compilers of FORTRAN in the computer system of FACOM 230-60,which is installed in the Computer Center of The Kyushu University, The Nagoya University, and The Hokkaido University. One of these three compilers is fastest in its compilation without optimization, called C-type. On the other hand, another two compilers, which are called D-type and E-type respectively, are oriented to produce optimized object from through somewhat sophisticated consideration. A comparison is made among the characteristics of these three compilers by investigating objects produced by each compiler for some tipical FORTRAN statements. The knowledge about characteristics of these compilers will show how to write a good program to programmers who use the Computer Center, and also give what assembly language is to both programmers and students interested in it.