guess its d drivers , since u said wen it gets outdated
An overhead projector is required to display content on transparencies. A transparency is a thin sheet of plastic in which light is reflected upon to display content.The light source emits light towards the transparency and then the image is displayed on the wall. Usually, this light source comes from below and lights upward and so the content is depicted above or overhead.
is a small handheld computer that performs simple tasks such as taking notes, scheduling appointments, and maintaining an address book and a calendar PDA.
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Personal Digital Assistant is the full form for PDA. PDAs are the computers in smaller size. They perform all works that are performed by a computer. They help you in viewing all the documents that you need, scheduling all your works,etc. They act as a mini sized computer that you can take where ever you go.
Using PDAs you can easily schedule any tasks, take notes, maintain all your contacts in address books,etc. Even though the markets of PDAs is not having higher demands because of the existence of i phones and other devices that are identical to i phones, there are still some usages and demands for PDAs. These are used in industries and businesses.