The 1107 and early 1108 machines were aimed at the engineering/scientific computing community, so much so that the 1100 Series User Group was named the UNIVAC Scientific Exchange, or USE. The operating systems were batch oriented, with FORTRAN and (to a much lesser extent) ALGOL being the most commonly used languages. As the market for commercial computing became more mature, these operating systems were no longer able to meet the growing demand for business computing, where applications were commonly written in COBOL. UNIVAC responded to this change in the market with the 1108A multiprocessor system and with the EXEC 8 operating system. Where engineering and scientific programs could often be "compute bound" (i.e. utilizing the entire CPU and core memory), business applications, typically written in COBOL, were almost always "I/O bound" (i.e. waiting for I/O operations to complete). Instrumentation of the EXEC 8 operating system showed that, in a 1108A multiprocessor configuration, the CPU(s) were often in the "idle loop" as much as 50% of the time (see note below). Since CPU performance was not an issue in these applications, it made commercial sense to create a lower-priced, lower-performance system to address the rapidly growing commercial business market.