A TEMPEST - approved version of the Apple II Plus was created in 1980 by the Georgia Tech Research Institute for U.S. Army FORSCOM .
A TEMPEST - approved version of the Apple II Plus was used as a component in the earliest versions of the Microfix system .
A TEMPEST - approved version of the Apple II Plus was created in 1980 by the Georgia Tech Research Institute for U.S. Army FORSCOM , and used as a component in the earliest versions of the Microfix system .