Accounting machine
The booking engine is a device which allows to evidence about transactions processed by machine. It developed in the 1930s from a combination of typewriter and adding machine and were produced until the 1980s and used. Although to booking engines also includes the function of machine computing, they are generally not considered one of the calculators.
A business booking process was costly and time-consuming in times of manual bookkeeping. Individual items first had to be added and then registered with a relevant posting notice and the appropriate document number by hand in the business directory under a specific account in the head or with a calculator. Causes of discrepancies were incorrect calculations, erroneous relationships between items, text and reference as well as illegible handwriting, even if the accountant at the time always tried, all perform correctly and legibly. Since the beginning of the era of machine writing and arithmetic, the accountant working machine, but first with two machines; a calculator for calculating the totals and a typewriter, were registered with the leaf on a book with text and reference book. The booking engine this simplified booking process, by automated and combined in the accounting calculations typically occurring in parts of the use of this necessary machinery.
The spectrum of options and functionality varies greatly among all models of the respective manufacturers. Clearly visible is a time- continuous progressive development and increasing complexity.
Due to the increasing demand for electronic storage and processing of data created with the magnetic accounts computer a completely new way of booking engines, which can be operated like a classic booking engine in principle, but essentially represent a specialized computer system from the mid-range systems.
Manufacturer
Almost all manufacturers of writing and / or calculators also produced booking engines. The following list is not exhaustive: