Comptometer News

1926 | 1.1 (December) | |||
---|---|---|---|---|
1927 | 1.2 (February) | 1.3 (June) | 1.4 (September) |
An 'in-house magazine' for operators of the Comptometer, an early mechanical adding machine, first developed in the 1880s and still in common use in businesses until the 1950s.
1926 | 1.1 (December) | |||
---|---|---|---|---|
1927 | 1.2 (February) | 1.3 (June) | 1.4 (September) |