The idea of a single network that integrates the existing voice and public telecommunications network (including the Internet), cable TV, data networks, and video broadcast networks so that they work together well. 

A standard that uses Internet and Web protocols to enable devices such as PCs, peripherals, intelligent appliances, and wireless devices to be plugged into a network and automatically know about each other. 

A microchip that facilitates communication through a computer's serial port using the RS-232C protocol. Like a UART, a USART provides the computer with the interface necessary for communication with modems and other serial devices. 

An operating system that originated at Bell Labs in 1969. In 1974, Unix became the first operating system written in the C language. Unix has evolved as a kind of large freeware product, with many extensions and new ideas provided in various versions.

An operating system that originated at Bell Labs in 1969. In 1974, Unix became the first operating system written in the C language. Unix has evolved as a kind of large freeware product, with many extensions and new ideas provided in various versions.

An unmanned aerial vehicle (UAV), commonly known as a drone is an aircraft without a human pilot aboard. Their flight is controlled either autonomously by onboard computers or by the remote control of a pilot on the ground or in another vehicle. The typical launch and recovery method of an unmanned aircraft is by the function of an automatic system or an external operator on the ground.

Unreal Engine is a complete suite of game development tools developed by Epic Games for game developers. Although primarily developed for first-person shooters, it gives everything a game developer needs to start and ship the game. The latest stable version, Unreal Engine 4.8.3 is released on July 29, 2015. The latest updates include: allowing updates of C++ code while the engine is running.

A generic label for describing any corporate information that is not in a database. Unstructured data can be textual or non-textual.  

A Global System for Mobile(GSM) communication technology that is used to send text between a mobile phone and an application program in the network. Applications may include prepaid roaming or mobile chatting.

To move to or install an improved or more modern version of computing hardware or software.

Uptime is a computer industry term for the time during which a computer is operational. Uptime is sometimes measured in terms of a percentile. 

Usability is the ease of use and learnability of a human-made object. It is a quality attribute that assesses how easy user interfaces are to use. Some factors used in determining product usability are ease-of-use, visual consistency, and a clear, defined process for evolution.

Usability analysis is having an analytical loot at your web pages to find out which part of your page users view first, how long they can stay and where they go next. Conducting an unsability analysis result in determing the layout, content and overall look of a page to ensure maximum impact.

A plug-and-play interface between a computer and add-on devices, such as media players, keyboards, telephones, digital cameras, scanners, flash drives, joysticks and printers.

USB 2.0 was released in April 2000. It is also called "Hi-Speed", adding higher maximum signaling rate of 480 Mbit/s (effective throughput up to 35 MB/s or 280 Mbit/s)

USB 3.0 was released in November 2008. The standard defines a new SuperSpeed mode with a signaling speed of 5 Gbit/s and a usable data rate of up to 4 Gbit/s (500 MB/s). A USB 3.0 port is usually colored blue, and is backwards compatible with USB 2.0. USB 3.0 ports come in low-power and high-power variants, providing 150 mA and 900 mA respectively while simultaneously transmitting data at SuperSpeed rates.