I want to write about the typical idioms you find in old-style FORTRAN programs:

• What do they mean?
• What are modern equivalents?

This will typically be the common things from FORTRAN 77 onwards, but perhaps also a wee bit about FORTRAN 66 (like one-pass loops?)

These are the keyword/subjects I am thinking about:

• array(*) versus array(:)
• array(10) as the starting point
• COMMON blocks and BLOCK DATA, named and blank COMMON
• history of computers:
  • hardware
  • memory management
  • tools like source code control systems
  • connections between computers, Internet
• equivalence
• constants as actual arguments
• intent
• temporary arrays - non-contiguous arrays
• implicit types
• double precision versus kind
• checking interfaces
• separate compilations, the misunderstanding of one routine per file
• fixed form and spaces
• standard input and output
• LU-numbers 5 and 6 (and 7)
• command-line arguments for file names
• real do-variables
• entry
• SAVE-attribute and SAVE as compiler property
• ASSIGN
• arithmetic IF
• computed GOTO
• F66: one-pass do-loops
• statement functions
• six characters
• numerical binary representations versus IEEE (IBM, Cray, Convex)
• big-endian and little-endian
• double complex
• unformatted versus binary files
• list-directed input and output - also: /
• narrow formats
• input formats with decimals - F5.1 and there is no decimal point in the input
• double precision :: x = 1.01 not the same as double precision :: x = 1.01d0
• use of d00 in input
• format statements