When tracking the amount of traffic on a Web site, it refers to a person who visits a Web site more than once within a specified period of time. Software that tracks and counts Web site traffic can distinguish between visitors who only visit the site once and unique visitors who return to the site. Different from a site’s hits or page views — which are measured by the number of files that are requested from a site — unique visitors are measured according to their unique IP addresses, which are like online fingerprints, and unique visitors are counted only once no matter how many times they visit the site. There are some ISPs that use Dynamic Host Configuration Protocol, such as AOLand cable modem providers, which use different IPs for every file requested, making one visitor look like many. In this case, a single IP address does not indicate a unique visitor.
- unlocked cellphone
When manufactured, GSM cellphones are unlocked, meaning they can be used with any subscriber identity module (SIM) from any compatible carrier service provider. A cellphone may be electronically ‘locked’ by a service provider, in which case it can only be used with that carrier’s service.
To convert a packed file into its original form. A packed file is a file that has been compressed to take up less storage area.
- Unstructured Data
The phrase unstructured data usually refers to information that doesn’t reside in a traditional row-column database. As you might expect, it’s the opposite of structured data — the data stored in fields in a database. Examples of Unstructured Data Unstructured data files often include text and multimedia content. Examples include e-mail messages, word processing documents, […]
In digital television, upconversion is the process where a lower resolution signal is converted to a higher resolution. This process will increase the number of pixels, frame rate or the scanning lines. Contrast with downconversion.
- unusual software bug
A classification of software bugs that are considered to be difficult to understand, recreate and repair. Most bugs that are classified as an unusual software bugs are named after scientists. Several bugs classified as an unusual software bug include the following: heisenbug bohrbug mandelbug schroedinbug