Easy Instructions for operating the Controlled-Key Comptometer
Book details
- Title
- Easy Instructions for operating the Controlled-Key Comptometer
- Publication year listed
- 1920
- Format
- Public domain eBook
- Reading access
- Free online reader; no registration required
- Source record
- View on Archive.org
About this book
Easy Instructions for operating the Controlled-Key Comptometer
Author: Herbert E. Robbins Ltd.
Year: 1920
Easy Instructions for operating the Controlled-Key Comptometer 1920? Herbert E. Robbins Ltd.? 24 page stapled booklet 185mm × 236mm This is a simplified manual for the Comptometer, a mechanical calculator. Unfortunately the booklet is missing its front and back covers. It has no copyright year, but it is the British version of the American manual from about 1920. Most pages are virtually identical apart from the photographs which now feature a Comptometer with a keyboard for British Currency, but a few pages of the American version have been omitted to make room for instructions about handling currency correctly. The American version is also available.