Office Machine Services
Repair, maintain, or install computers, word processing systems, automated teller machines, and electronic office machines, such as duplicating and fax machines.

Office Workers
Rather than performing a single specialized task, general office workers have responsibilities that often change daily with the needs of the specific job and the employer. Whereas some spend their days filing or keyboarding, others enter data at a computer terminal. They also can be called on to operate photocopiers, fax machines, and other office equipment; prepare mailings; proofread documents; and answer telephones and deliver messages.

Information Technology Services
The study, design, development, implementation, support or management of computer-based information systems, particularly software applications and computer hardware.