Printing in East Asia evolved from ink rubbings made on paper or cloth from texts on stone tables in China during the Han dynasty. Mechanical woodblock printing on paper started in China during the Tang dynasty before the 8th century CE. Use of woodblock printing quickly spread to other East Asian countries. While the Chinese used only clay and wood movable type at first, use of metal movable type was pioneered in Korea by the 13th century. The Western-style printing press became known in East A
Definition of 'overhead projector'. overhead projector. An overhead projector is a machine that has a light inside it and makes the writing or pictures on a sheet of plastic appear on a screen or wall. The abbreviation OHP is also used. COBUILD Advanced English Dictionary.
overhead-Computer Definition. Data that is not part of the user data, but that is stored or transmitted with it. Overhead can be used for a wide variety of purposes, such as circuit monitoring, channel separation, addressing, error control, priority indication, and congestion management.verhead-Investment & Finance Definition. Expenses that arenât directly related to the production of goods or services, but are more general and company-wide in nature. Examples of overhead are salaries for staff positions at headquarters and in human resources, accounting, payroll, and security departments.