Imperial 220 Designer (Person) Unknown Manufacturer Litton Industries Manufactured for Imperial Date 1972 (circa)
T1-100 11 Texas Instruments calculator Designer (Person) Unknown Manufacturer Texas Instruments Date 1982 (circa)
Sharp EL-8032 Elsi mate calculator Designer (Person) Unknown Manufacturer Sharp Date 1980 - 1989 (circa)
Casio Electronic Printing Calculator HR-100 Designer (Person) Unknown Manufacturer Casio Date 1980 - 1989 (circa)