H.264

A standard for video compression developed by MPEG and VCEG for a wide range of bit rates and resolutions. Also known as MPEG-4 AVC (Advanced Video Coding) and MPEG-4 Part 10.

HA

High availability. Sun Ray HA groups have traditionally been called failover groups.

head

Colloquial term for a screen, or display, or monitor, especially in a context where more than one is used in conjunction with the same keyboard and mouse, as in "multihead" feature.

high availability

See failover. The term high availability refers to a benefit of this type of configuration; the term failover group refers to the functionality.

hotdesking

The ability for a user to remove a smart card, insert it into any other client within a failover group, and have the user's session "follow" the user, thus allowing the user to have instantaneous access to the user's windowing environment and current applications from multiple clients.

hot key

A predefined key that causes an activity to occur. For example, a hot key is used to display the Settings screen on the Sun Ray Client.

hot-pluggable

A property of a hardware component that can be inserted into or removed from a system that is powered on. USB devices connected to Sun Ray Clients are hot-pluggable.