Do both LINK 480Z and CARDboard Illustrative Aid to Computation both involve computers?
LINK 480Z The LINK 480Z was an 8-bit microcomputer produced by Research Machines Limited in Oxford, England, during the early 1980s.
Plurimeter A plurimeter is a hand-held measuring instrument for determining surface area or relative angles between surfaces. The device uses mechanical action for calculating the result, analogous to a slide rule. In modern technology, these results are computed by calculator or computer rather than by mechanical instrument.