The EFA modular computer concept is based on a modular multiprocessor
architecture with an efficient internal communication ii structure and
comprehensive BIT facilities. The system architecture, the electronic
modules including their associated software, and the mechanical conce
pt are developed to provide a modular computer which is adaptable to t
he needs of different applications, in particular for the EFA computer
s, and is expandable for future growth. This architecture has been sel
ected for the EFA: Attack computer (AC) Navigation computer (NC) inter
face processor unit (IPU) and Defensive aids computer (DAC). This pape
r gives an overview of the family concept, the features and the partit
ioning of the above-listed computers.