Brian Cryer's Glossary of IT Terms with Links

BL

BL

1. Black List.

See Blacklist for details.

2. Boundary Layer.

In a GIS context a boundary layer is a feature layer on a map which contains boundaries (for example district or regional boundaries).

In other contexts a boundary layer is the surface on which two boundaries meet. For example the surface of the sea is the boundary layer between sea-water and air.

3. Back Link.

A back link is a link to one web page from another. Back links represent those pages (or specifically the links on those pages) that link to a given page. Back Links are also known as inbound links.

4. Block List.

A block list is a list of IP addresses from which email addresses should be blocked. See DNSBL for details.