Protein & Calorie Calculator for Caterers
1980-1995
Monroe 360/65 bond trader
1976
Fuller cylindrical calculator on stand made by W. F. Stanley & Co. Ltd
circa 1940
Mechanical Calculator
1915-1925
Solar-powered electronic calculator
1990
Textile calculator made by Fowler Ltd
1910-1914
Hewlett Packard HP 9810A programmable desktop calculator
1971
Olivetti Logos 270 electric printing calculator
circa 1970
Rockwell 41OP electronic printing calculator
Integrator Unit from Hartree Differential Analyser
1936
L5000 Accounting Machine
1970-1979
Commodore 774D Calculator
1973-1975
Addiator "Arithma" Calculator
1960-1965
Casablancas Textile Twist Calculator
1900-1930
Seiko combined wristwatch and electronic calculator
1978
Rotating Calculator
1922-1927
Mechanical Calculator
1925-1935
Isotope calculator designed by AERE
1960
Commodore personal minicomputer (electronic calculator). Model 796M
circa 1979
Prinztronic SC1500M electronic calculator
circa 1980
Addo adding machine model 16
1940-1959
Brother Procol 508AY
circa 1977
EL-112
circa 1976
Elsimate EL-8015
circa 1978
HP 55
1974
Multi-function preprogrammed Scientific notation calculators
1975
Lloytron Accumatic 340 with case, s/n 102904, 1976
1976
Sharp EL-8010 with case s/n 50800247, 1973
1973
Novus 4515 Mathematician PR with case, s/n 1008015
Hewlett-Packard 55 with case, s/n 1503S01963, 1975
1975
"Posographe" photographic exposure calculator
Key-Set Mechanical Calculator
1950
Sharp Electronic Calculator
1965-1975
Bell Punch "Anita" Electronic Calculator
1969-1971
Mechanical Calculator
1915-1925
Rotch true-wind calculator, for use at sea
1903
Mechanical Calculator
1916
Half adder from Type 555 Hollerith Electronic Calculator
1957
Key-Set Mechanical Calculator
1920-1940
Comptometer 993e electric calculator
1955-1965
Sumlock 324G Scientist Calculator
1970-1975
Key-Set Mechanical Calculator
1945-1955
Key-Set Mechanical Calculator
1945
Curta Type 2 Cylindrical Calculator
1959
'Dromoscope' hurricane locator, 1879
1879
CASIO AL-2000 programmable calculator presented to GE Perry
Circular Colliery Ventilation Officer's calculator
Radiac slide rule by Blundell Rules Limited
1960-1972
Portable Electronic Calculator
1970
HP22
1975