Fortran : 1st program 1954, Sept 20
-
After university, I worked in a mining company which had a CDC 7000. I remember that it had a file system called LISA (Linked Access Sequential Access I think it meant). When they upgraded to a CDC Cyber something it was fantastic. We used to compile the program and then do the fine tuning in the assembly output to get speed. That was the time when we used manual stop watches to measure the speed of a program when we tried to get the best time possible, a couple of seconds more or less didn't make a difference.
In programming the CDC 6600 I also used to recode the innermost stuff in assembly language for speed. Time on our system was charged by the second. High priority jobs were scheduled immediately but cost 50c per second. That was in 1973 when my entry-level job paid $6000 per year, so it is more like $5 per second today. The compilers were not as good as optimizing as today's compilers so a good recode in assembly language could result in a 10x speedup, i.e. a 10x reduction in cost. In addition there was a charge for the number of I/O operations but there was also a multiplier for the field-length (the amount of main memory you were using at the time of the I/O) since the job tied up main memory due to the I/O buffers needing to be fixed during the transfer. This meant it was also very beneficial to structure a job to reduce its memory utilization to the absolute minimum during an I/O phase and expand it to the maximum during a CPU-bound phase. Again there was the possibility for 10-fold reductions in cost.
-
Very geeky Foxtrot comic for Fortran celebration! https://i.stack.imgur.com/TKkXL.jpg[^] Sept 20, 1954 the first Fortran program was run. On this day 09/20 – Manning[^]
-
[^]
>64 If you can keep your head while those about you are losing theirs, perhaps you don't understand the situation.
-
Very geeky Foxtrot comic for Fortran celebration! https://i.stack.imgur.com/TKkXL.jpg[^] Sept 20, 1954 the first Fortran program was run. On this day 09/20 – Manning[^]
-
Very geeky Foxtrot comic for Fortran celebration! https://i.stack.imgur.com/TKkXL.jpg[^] Sept 20, 1954 the first Fortran program was run. On this day 09/20 – Manning[^]
At the risk of playing can you top this, IMB 1130, 1965, 8K memory. OOPS: IBM
>64 If you can keep your head while those about you are losing theirs, perhaps you don't understand the situation.
-
Very geeky Foxtrot comic for Fortran celebration! https://i.stack.imgur.com/TKkXL.jpg[^] Sept 20, 1954 the first Fortran program was run. On this day 09/20 – Manning[^]
-
At the risk of playing can you top this, IMB 1130, 1965, 8K memory. OOPS: IBM
>64 If you can keep your head while those about you are losing theirs, perhaps you don't understand the situation.
Coded in FORTRAN (before numbered versions) in 1962, IBM 7090. Fortunately graduated to assembler for CDC 3600 by 1964 (for a COBOL compiler)
Joan F Silverston jsilverston@cox.net nhswinc.com
-
Fortran IV IBM 360 Watfor compiler - February 1971 University of Witwatersrand, Johannesburg as a student. First paid program on same computer as a research assistant December 1971. 50 years ago.
My first programming class in college (fall of 1979) used WATFIV on an IBM 370.
Software Zen:
delete this; -
My first program was in Fortran IV and was for an IBM 360 in 1968. Last time I used Fortran was in 1988 on a MicroVax.
-
Fortran IV IBM 360 Watfor compiler - February 1971 University of Witwatersrand, Johannesburg as a student. First paid program on same computer as a research assistant December 1971. 50 years ago.
FORTRAN IV on WATFOR was my first high level language (if you exclude Honeywell Time Sharing Basic). I was still at school in 1974 and borrowed a textbook overnight and read it cover-to-cover. Then upset the teacher it belonged to by writing more complex programs than she could. (Coding sheets sent to the local county council for mispunching onto 80-char punch cards - turn-round time: 2 weeks)
-
FORTRAN IV on WATFOR was my first high level language (if you exclude Honeywell Time Sharing Basic). I was still at school in 1974 and borrowed a textbook overnight and read it cover-to-cover. Then upset the teacher it belonged to by writing more complex programs than she could. (Coding sheets sent to the local county council for mispunching onto 80-char punch cards - turn-round time: 2 weeks)
