I put this reference to clarify the industry position, and to validate the authors concern that since he was probably there while it was happening, as was I, that the quoted source was correct, and invalidated the premise of the article that the ISA Bus began with the IBM Personal Computer AT, and was a 6Mhz 16-bit bus, and NOT an 4.77Mhz 8-bit bus, for the IBM Personal Computer PC and the IBM Personal Computer XT.