Τεχνικός Υπολογιστών CompTIA A+

An LCD panel technology that provides wide viewing angles, good color, and high contrast.

A device used to suction dust and debris from computers and wiring closets.

In scripting, the name of a storage location in the computer’s internal memory. The value of the variable is the contents at that memory location. It Is called a variable because the value can change (vary) as the program runs.

A scripting language designed specifically for use with Microsoft Internet Explorer. A VBScript file has the extension .vbs.

The type of voltage used inside computers, printers, laptops, and displays.

An environment in which the PC’s operating system resides on a server.

A closed source operating system that is not allowed to be modified or distributed unless authorized by the developer, such as Apple’s iOS.

Computers require good ventilation. Never block air vents, especially on a laptop.

Lines that appear on printer paper that may be caused by debris on the corona wires or in the developer unit in the cartridge. Replace cartridge.

Streaking that can occur on printer paper because of toner cartridge. Remove the toner cartridge, hold the toner cartridge in front of you with both hands, and rock it gently back and forth, re-insert the cartridge into the printer, and test the printer.

An extension of the FAT file system that allowed filenames to be up to 255 characters starting with Windows 95.

A type of monitor that displays at least a 640×480 resolution or greater and connects to a 15-pin D-shell connector.

A mode used when a computer boots into Safe Mode.

A type of 15-pin three-row video port that normally has a CRT monitor attached.

A command line text editor used by macOS and Linux.

An adapter used to output video to a display. Contrast with onboard video card.

A situation in which an application does not have to be installed on an individual device, and just some of the code needed to run the application is loaded. Also called cloud-based application.

A mobile operating feature that uses voice commands to obtain information such as directions and current sports scores and to dictate emails or texts.

An environment in which the client computer operating system and applications are hosted remotely in a cloud environment.

A way for an operating system to appear as a separate computer to each application. One computer that has two or more operating systems installed that are unaware of each other due to virtualization software.

A method of simulating extra memory by using the hard disk space as if it were RAM.

A network interface card used in a virtual environment. Each virtual NIC has its own MAC address and can have an IP address assigned.

Printing to somewhere other than to the directly connected printer and to a specific file so that the information can be viewed, saved, emailed, or sent to another printer.

Another name for virtualization, which is a process that allows multiple operating systems to be installed and share hardware resources.

A Windows 7 tool that was previously known as Windows XP Mode that can be downloaded and used in Windows 7 Professional and higher versions to allow older applications to run.

A process that allows a computer to run multiple operating systems without affecting each other, share hardware, and provide a test environment for software that may not be compatible on a specific platform.

A BIOS/UEFI option to enable or disable the capability of the computer to be used in a virtualization environment where more than one operating system can share the same hardware resources.

A computer that has multiple operating systems in a virtual environment in which one operating system has no interaction with the other operating system; they are independent of one another. A virtualization PC has multiple powerful multicore processors, maximum RAM, multiple fast large-capacity hard drives, 1 Gb/s network connection, virtualization software, and a possible NAS.

A program designed to change the way a computer originally operated.

The actual area of a monitor seen by a user.

A switch technology that allows assignment of ports to a specific VLAN number, thus creating separate networks so that the devices that connect to ports assigned to one VLAN number cannot see devices that connect to switch ports assigned to a different VLAN number.

Used when deploying Windows in the enterprise environment.

See virtual machine.

A situation in which one computer can be controlled from a remote network, device such as when a computer technician needs to install a network printer onto a remote computer.

A wireless device that originally was designed to respond to voice commands for music control but now may contain a digital assistant and/or control other smart devices.

A way of sending phone calls over the Internet or over networks that traditionally transmitted only data.

The measurement for voltage.

An electronic measurement of the pressure pushing electrons through a circuit. Voltage is measured in volts.

A section of a storage device that receives a drive letter and to which data can be written.

See VLK.

A remote computer connecting to a remote network by “tunneling” over an intermediate network, such as the Internet or a LAN.

A peripheral similar to goggles used to see high-definition images in a simulated environment.

A type of memory that was used on older video cards.