FORTRAN

• FORTRAN II (4K) Primitive version of language
• FORTRAN IV (8K or more).
• Reasonable implementation of language.
• Variable name length limited to 6 characters.
• Has libraries for controlling some devices like plotter.
• Two nested DO I = 1 to 500 loops 3.5 minutes. It compiles to floating point processor instructions which are interpreted unless you have one.
• Still GOTO based language at this version
• FORTX enhanced FORTRAN II
• Real compiled language. Nested loops 3.5 seconds.
• Integers only 12 bits.
• Documentation file in image.
• Has block IF, WHILE, DO