The 1100/60 System was available in both Single Processor 1100/61 (Model C1) and Dual Processor 1100/62 (Model H1) configurations. It was implemented using custom Sperry Univac designed Micro-Processor Integrated Circuits. Main Storage (524K to 1048K) words per CPU, optional Semiconductor Buffer Storage (up to 8K words per CPU), and the Input/Output Unit (IOU) were contained in CPU cabinet. The IOU (optionally) supported both Block and Word Channels. The system also included a System Support Processor for diagnostic testing and system console support.