If you search ebay for "an/ayk", two additional listings will show up, both for magazine advertisements, one from 1979 and one from 1982, presumably depicting the kind of hardware this box controlled. Here's some more data: AN/AYK-14 Type: Airborne general purpose computer. Description: The Control Data AYK-14 is the USN's standard aircraft computer and is described as being a microprogrammable device that is functionally partitioned into modules. It is reported to be able to accommodate up to 16 Input/Output (I/O) cards, five of which are smart and incorporate their own onboard controllers. Use of an expansion chassis allows for additional I/O ports and the device incorporates two memory busses to provide overlapping memory access. A PrePlanned Product Improvement (P3I) variant of the design was first delivered during 1987 and is described as featuring a new single card processor (which replaces three cards in the original configuration) that offers twice the processing power and eight times the memory of its predecessor. The new processor is also noted as incorporating a 16-bit central processor, a 32-bit math co-processor (designated as the Extended Arithmetic Unit), a cache memory and an extended instruction set. Control Data is also understood to have developed a plug-in Very High-Speed Integrated Circuit (VHSIC) processor module for use with the P3I AYK-14. This VHSIC insert incorporates a 64 k cache memory and is said to quadruple the device's processing power and `substantially' increase its memory. Deliveries of the plug-in VHSIC module began during 1991 and it is thought that all the USN's P3I AYK-14s will eventually be fitted with it. The following specifications relate to the P3I variant of the device. I/O: up to 16 Speed: up to 2.3 Mips Clock rate: 1 MHz Word length: 16 bits (can work on up to 32-bit data) Memory: 4 mwords (in 32 kword semiconductor or 64 kword core modules) Here's another neat link: http://vipclubmn.org/cp16bit.aspx This too: http://www.globalsecurity.org/military/library/policy/navy/ntsp/ANAYK-14_a.h tm On 12/1/08 8:59 PM, "William Donzelli" <wdonzelli at gmail.com> wrote: Rich -- Rich Cini Collector of Classic Computers Build Master and lead engineer, Altair32 Emulator http://www.altair32.com http://www.classiccmp.org/cini