|J28-200-1_Jan60_1401asm.pdf||t, :J yJ 1401 DATA PROCESSING SYSTEM BULLETIN
IBM 1401 SYMBOLIC PROGRAMMING SYSTEM: PRELIMINARY SPECIFICATIONS
This bulletin is a minor revision of, but does not supersede, the original edition, form }28-0200. Principal changes
are the addition of information regarding the output accompanying the object program (page 10) and the inclusion
of Control and Execute commands as part of the Processor Control Operations (page 19).
In order to solve a given problem or perform a given function, the IBM 1401 Data
Processing System must execute a logical sequence of instructions known as a program.
To be meaningful, this program must be written in the actual language of the machine.
A program written in this manner is said to be coded in machine language. This method
of coding can be time-consuming and prone to clerical and logical errors. Also a hand
, coded ma.chine language program, which may represent a great deal of programming
effort, is not relocatable; t|