Block Started by Symbol (BSS) was a pseudo-op in UA-SAP (United Aircraft Symbolic Assembly Program), the assembler developed in the mid-1950's for the IBM 704 by Roy Nutt, Walter Ramshaw, and others at United Aircraft Corporation. An assembler is a computer program for translating assembly language — essentially, a mnemonic representation of machine language — into object code. ... The IBM 704, the first mass-produced computer with floating point arithmetic hardware, was introduced by IBM in April, 1956. ... The United Aircraft and Transport Corporation was formed In 1929, when William E. Boeing Sr. ...

The BSS pseudo-op was later incorporated into FAP (FORTRAN Assembly Program), IBM's standard assembler for its 709 and 7090/94 computers. It defined its label and reserved space for a given number of words. FORTRAN Assembly Program (FAP) was a macro assembler for the IBM 709, 7090, and 7094 computers of the 1950s and 60s. ... International Business Machines Corporation (IBM, or colloquially, Big Blue) NYSE: IBM (incorporated June 15, 1911, in operation since 1888) is headquartered in Armonk, NY, USA. The company manufactures and sells computer hardware, software, infrastructure services and consulting services. ... The IBM 700/7000 series was a series of incompatible large scale (mainframe) computer systems made by IBM through the 1950s and early 1960s. ...

Most modern assemblers produce a BSS section in their output object module containing all reserved uninitialized space. In computer science, object file or object code is an intermediate representation of code generated by a compiler after it processes a source code file. ...

Memory address (based on Stevens, Rago: "Advanced Programming in the Unix Environment").