Resolution Definition
Resolution measures the number of pixels in a digital image or display. It is defined as width by height, or W x H, where W is the number of horizontal pixels and H is the number of vertical pixels. For example, the resolution of an HDTV is 1920 x 1080.
Image Resolution
A digital photo that is 3,088 pixels wide by 2,320 pixels tall has a resolution of 3088 × 2320. Multiplying these numbers together produces 7,164,160 total pixels. Since the photo contains just over seven mi...
Read More
Printer Definition
Printer Definition
A printer is an output device that prints paper documents. This includes text documents, images, or a combination of both. The two most common types of printers are inkjet and laser printers. Inkjet printers are commonly used by consumers, while laser printers are a typical choice for businesses. Dot matrix printers, which have become increasingly rare, are still used for basic text printing.
The printed output produced by a printer is often called a hard copy, which is the p...
Read More
Plug and Play Definition
Plug and Play Definition
Plug and Play, sometimes, abbreviated PnP, is a catchy phrase used to describe devices that work with a computer system as soon as they are connected. The user does not have to manually install drivers for the device or even tell the computer that a new device has been added. Instead the computer automatically recognizes the device, loads new drivers for the hardware if needed, and begins to work with the newly connected device.
For example, if you connect a Plug-and-Pl...
Read More
Driver Definition
Driver Definition
A driver, or device driver, is a software program that enables a specific hardware device to work with a computer's operating system. Drivers may be required for internal components, such as video cards and optical media drives, as well as external peripherals, such as printers and monitors.
Most modern hardware is "plug and play," meaning the devices will work without requiring driver installation. However, even if a hardware device is recognized by the operating system, inst...
Read More
ODBC Definition
ODBC Definition
Stands for "Open Database Connectivity." With all the different types of databases available, such as Microsoft Access, Filemaker, and MySQL, it is important to have a standard way of transferring data to and from each kind of database. For this reason, the SQL Access group created the ODBC standard back in 1992. Any application that supports ODBC can access information from an ODBC-compatible database, regardless of what database management system the database uses.
For a datab...
Read More
DBMS Definition
DBMS Definition
Stands for "Database Management System." In short, a DBMS is a database program. Technically speaking, it is a software system that uses a standard method of cataloging, retrieving, and running queries on data. The DBMS manages incoming data, organizes it, and provides ways for the data to be modified or extracted by users or other programs.
Some DBMS examples include MySQL, PostgreSQL, Microsoft Access, SQL Server, FileMaker, Oracle, RDBMS, dBASE, Clipper, and FoxPro. Since the...
Read More
E-commerce Definition
E-commerce Definition
E-commerce (electronic-commerce) refers to business over the Internet. Web sites such as Amazon.com, Buy.com, and eBay are all e-commerce sites. The two major forms of e-commerce are Business-to-Consumer (B2C) and Business-to-Business (B2B). While companies like Amazon.com cater mostly to consumers, other companies provide goods and services exclusively to other businesses. The terms "e-business" and "e-tailing" are often used synonymously with e-commerce. They refer to the...
Read More
Schema Definition
Schema Definition
A schema is an outline, diagram, or model. In computing, schemas are often used to describe the structure of different types of data. Two common examples include database and XML schemas.
1. Database Schema
A database schema describes the tables and corresponding fields contained in a database. It may be displayed as a list of tables that each contain a sublist of fields along with the associated data type. More commonly, however, database schemas are displayed as visual diagra...
Read More
MAMP Definition
MAMP Definition
Stands for "Mac OS X, Apache, MySQL, and PHP." MAMP is a variation of the LAMP software package that can be installed on Mac OS X. It can be used to run a live web server from a Mac, but is most commonly used for web development and local testing purposes.
Apache (or "Apache HTTP Server") is the component used to configure and run the web server. Once installed, Apache enables a Mac to host one or more websites. By configuring and running a local Apache web server, web developer...
Read More
WAMP Definition
WAMP Definition
Stands for "Windows, Apache, MySQL, and PHP." WAMP is a variation of LAMP for Windows systems and is often installed as a software bundle (Apache, MySQL, and PHP). It is often used for web development and internal testing, but may also be used to serve live websites.
The most important part of the WAMP package is Apache (or "Apache HTTP Server") which is used run the web server within Windows. By running a local Apache web server on a Windows machine, a web developer can test we...
Read More