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Ultra HD Blu-ray (marketed as 4K Ultra HD) is a digital optical disc data storage format that supersedes Blu-ray. Ultra HD Blu-ray discs are incompatible with existing standard Blu-ray players (though in most cases, a traditional Blu-ray and digital copy has been packaged with the Ultra HD Blu-ray discs). Ultra HD Blu-ray supports 4KUHD (3840 × 2160 pixel resolution) video at frame rates up to 60 progressive frames per second, encoded using High Efficiency Video Coding. The discs support both high dynamic range by increasing the color depth to 10-bit per color and a greater color gamut than supported by conventional Blu-ray video by using the Rec. 2020 color space. It is supported on Microsoft’s Xbox One X as well as the S model, as well as Sony’s upcoming PlayStation 5 video game consoles.

https://en.m.wikipedia.org/wiki/Ultra_HD_Blu-ray

In computing and telecommunications, a unit of information is the capacity of some standard data storage system or communication channel, used to measure the capacities of other systems and channels. In information theory, units of information are also used to measure the entropy of random variables and information contained in messages.

https://en.m.wikipedia.org/wiki/Units_of_information

The Universal Mobile Telecommunications System (UMTS) is a third generation mobile cellular system for networks based on the GSM standard. Developed and maintained by the 3GPP (3rd Generation Partnership Project), UMTS is a component of the International Telecommunications Union IMT-2000 standard set and compares with the CDMA2000 standard set for networks based on the competing cdmaOne technology. UMTS uses wideband code division multiple access (W-CDMA) radio access technology to offer greater spectral efficiency and bandwidth to mobile network operators.

https://en.m.wikipedia.org/wiki/UMTS

With reference to a given (possibly implicit) set of objects, a unique identifier (UID) is any identifier which is guaranteed to be unique among all identifiers used for those objects and for a specific purpose. The concept have been formalized early in Computer science and Information systems, in general associating it to an atomic data type.

https://en.m.wikipedia.org/wiki/Unique_identifier

In computer networks, to upload is to send data to a remote system such as a server or another client so that the remote system can store a copy.

https://en.m.wikipedia.org/wiki/Upload

User interface

In the industrial design field of human-computer interaction, a user interface (UI) is the space where interactions between humans and machines occur. The goal of this interaction is to allow effective operation and control of the machine from the human end, whilst the machine simultaneously feeds back information that aids the operators’ decision-making process. Examples of this broad concept of user interfaces include the interactive aspects of computer operating systems, hand tools, heavy machinery operator controls, and process controls. The design considerations applicable when creating user interfaces are related to, or involve such disciplines as, ergonomics and psychology.

https://en.m.wikipedia.org/wiki/User_interface