Lan‐Alog: a portable analogue computer

The Lan‐Alog Four computer is one of a family of small computers being designed by the staff at Enfield College of Technology, in consultation with other colleges and schools. The first computer teaching aid was described briefly in TECHNICAL EDUCATION last year (page 301, June 1964 issue), and in more detail elsewhere. These computer units are based on circuits using transistors, operating at ±15V, and the maximum number of common components is employed throughout the range. One aim of the design is to involve the student fully in the use of the equipment, and considerable attention has therefore been paid to the achievement of clear layout, case of programming, and rugged, student‐proof, construction.