Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. A copyholder is a device that holds written material for typing. They have been used with typewriters or more often on a computer word processor like WordPad or Microsoft Office Word. Some stand independently or are attached to a computer monitor. They can support entire booklets or a single page. Elaborate varieties even can be adjusted by height or angle and even come with rulers and guides that appear over the front of the page.

Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после получения заказа.