Friday, October 22, 2010

Simbols and Numbers

& (Ampersand) - The ampersand is used to indicate special characters in HTML (HypertextMarkup Language) documents—that is, documents for the World Wide Web. For example, & specifies the ampersand character (&); ö specifies a lowercase o with an umlaut, or dieresis, mark (ö).

< >(Angle Brackets) -Angle brackets are used in pairs to surround markup tags in HTML (Hypertext Markup Language) documents for the World Wide Web. For example,

indicates a paragraph break; and indicate the start and end of a section that is to be displayed in boldface.

* (Asterisk) - In several operating systems, the asterisk serves as a wildcard character: to represent one or more characters, such as in a file name or extension. For example, a* matches act, actor, and and, but not band. In pattern matching involving regular expressions, the asterisk matches the occurrences of the single character immediately preceding it. For example, ba*th matches bth, bath, and baaaaath, but not bbath. In e-mail and in other contexts that use plain text, asterisks are sometimes used around words or phrases to indicate emphasis. For example, “I *really* want to emphasize the second word in this sentence.”

10BaseX - The designations 10Base2, 10Base5, 10BaseF, and 10BaseT refer to various types of baseband Ethernet networks.

10BaseT - The 10BaseT is a baseband 802.3-based Ethernet network that uses unshielded twisted-pair (UTP) cable and a star topology. This version can operate at up to 10 Mbps. It is also known as twisted-pair Ethernet or UTP Ethernet.

110-Type Punch-Down Block -A device for terminating wires, with the possibility of connecting input and output wires. This type of punch-down block has generally replaced the older 66-type blocks originally used by the telephone company.