The T/16 CPU was a proprietary design. It was greatly influenced by the HP 3000 minicomputer. They were both microprogrammed, 16-bit, stack-based machines with segmented, 16-bit virtual addressing. Both were intended to be programmed exclusively in high-level languages, with no use of assembler. Both were initially implemented via standard low-density TTL chips, each holding a 4-bit slice of the 16-bit ALU. Both had a small number of top-of-stack, 16-bit data registers plus some extra address registers for accessing the memory stack. Both used Huffman encoding of operand address offsets, to fit a large variety of address modes and offset sizes into the 16-bit instruction format with very good code density. Both relied heavily on pools of indirect addresses to overcome the short instruction format. Both supported larger 32- and 64-bit operands via multiple ALU cycles, and memory-to-memory string operations. Both used "big-endian" addressing of long versus short memory operands. These features had all been inspired by Burroughs B5500-B6800 mainframe stack machines.