A large variety of equipment and ‘machines are used in modern offices for performing different operations. These may be broadly classified into three groups as follows:
1. Copying and duplicating machines: These machines help in getting multiple copies of a document. The common examples of such machines are typewriters, duplicators, addressing machines and photocopying machines.
2. Accounting, tabulating and computing machines: These machines are used for’ doing accounting work, and arranging and tabulating various kinds of data. They include calculators, adding and listing machines, billing machines, accounting machines, tabulating machines, cash register, electronic computer, etc.
3. Communication machines: Telephone, inter-communication system, telex and telefax are widely used by big offices for internal and external communication.