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SINGAPORE4D The switches could be tested and the lights turned on or off under program control. IBM's Fortran language, first released for the 704, included statements to test the switches and set or reset the lights. 1 and n2 are statement numbers. SENSE LIGHT 0 reset all four lights. On the IBM 1620 there are four switches, and their state can be tested via special forms of the IF-statement offered by the FORTRAN compiler for the IBM 1620. For the IBM 1130 there are sixteen switches matching the sixteen-bit word size of the computer, plus a toggle switch adjacent to the power on/off switch.|Know your Enemy (Rage against the Machine Song)