PawPrint.net Glossary of Terms

An organised collection of data stored in a central location. Information should be structured by subject to allow access by business area. Data Warehouse software often includes sophisticated compression and hashing technique

It usually consists of a metallic conductor pattern on an epoxy glass composite insulating substrate, more complex circuits have several layers stacked togeather. After assembly where components are added, it is known as a printed wiring assembly (PWA).  

A measure of image resolution - typical screen resolution is 72 dip whereas printing presse print at 300dpi.

When measuring the resolution of an image you need to know both the physical size and the resolution (in DPI) to acertain the actual amount of data. For example:

An image that is 10 inches wide...

at 72dpi would be 720 pixels wide
at 300dpi would be 3000 pixels wide (roughly 3.5 times the resolution)

A protocol developed to enable the transfer of files across a network. It provides a reletively insecure username and password  security but has been more recently enhanced to allow for SSL encryption to provide a secure password exchange.

To some extent the use of FTP has been superceeded by SFTP (a component of SSH) or the secure file transfer protocol.

The opening of a lens that admits light. Except in very simple cameras, the Aperture can be varied in size by an adjustable  diaphragm, which regulates the amount of light passing through the lens. The relative Aperture is measured as the focal length of the lens divided by the diameter of the Aperture; this is expressed as an f-number: f/3, f/5, and so on.

Aperature has a dramatic effect on the Depth-of-field of the photograph.

An ISO/ANSI/ECMA standard that specifies a way to annotate text documents with information about types of sections of a document. This is the root of most other markup languages: XML and HTML being examples.