DYSEAC was a first-generation computer built by the National Bureau of Standards for the U.S. Army Signal Corps. It was housed in a truck, making it one of the first movable computers (perhaps the first).

The interface specification of a procedure describes the procedure's behaviour using pre- and postconditions. These pre- and postconditions are written using various functions. If some of these functions are partial, or underspecified, then the ... The development of a system can start with the creation of a specification.

The central core of the DYSEAC is a complete general-purpose high-speed digital computer utilizing the same basic electronic circuit elements as those in SEAC. In the DYSEAC, however, these basic building blocks have been organized into a far more powerful system for controlling and responding to auxiliary external devices.

2021年9月28日 · Built by the National Bureau of Standards for the US Military, DYSEAC might be the first computer to be specifically made to be moved from one place to another. Calling it 'portable' would be something of a stretch, as the device weighed around 20 tons and took two trailer vans to transport.

The early engi-neering and maintenance developments are described in an NBS Circular published in 1955: Computer Develop-ment (SEAC and DYSEAC) at the National Bureau of Standards [1].

In the course of developing the system plans for the DYSEAC and the SEAC, certain standard methods and procedures were evolved for producing a large-scale digital computer design. These standard procedures cover, first, the development of system specifications, second, the development of functional plans, and finally the development of wiring ...

DYSEAC was a mobile computer (carried in two tractor trailers at 12 and 8 tons, respectively!) built for the US Army Signal Corps. DYSEAC had two program counters, and an I/O signal caused execution to switch from one PC to the other.

In developing system specifications for the SEAC and DYSEAC, an effort was made to specify a balanced system in which each component part was organized to do only what it needed to do and no more.

The DYSEAC is a complete general-purpose high-speed digital computer utilizing the same basic electronic circuit elements as those in SEAC. In the DYSEAC, however, these basic building blocks have been organized into a more powerful system for controlling and responding to auxiliary devices.

DYSEAC was a first-generation computer built by the National Bureau of Standards for the U.S. Army Signal Corps. It was housed in a truck, making it one of the first movable computers …