History of Guernsey 933 when the islands, came under the control of William Longsword, son of Rollo the first Duke of Normandy, having been annexed from the Duchy of Brittany by the Duchy of Normandy. The island of Guernsey and the other island in the Channel Islands represent the last remnants of the medieval Duchy of Normandy. In the islands, Elizabeth II's traditional title as head of state is Duke of Normandy. (The masculine nomenclature "Duke" is retained even when the monarch is female.) According to tradition, Robert I, Duke of Normandy (the father of William the Conqueror) was journeying to England in
SIMMON and delay I/O events, these would appear to the guest program as happening unnaturally quickly. Programs under test -- so-called "guest programs" -- had to be capable of stand-alone operation on the bare hardware. SIMMON provided services for the test tools, but not for the guest. These were some of the programs that had been tested using SIMMON: SIMMON SIMMON (SIMulation MONitor) was a proprietary software testing system developed in the late 1960s in the IBM Product Test Laboratory, then at Poughkeepsie, N.Y. It was designed for the then-new line of System/360 computers as a vehicle for testing the software