H:

Hardware Abstraction Layer. Used to provide a generic interface to the hardware and 'hide' hardware-specific functions.

A handle is a way of identifying an object that is owned or managed by another thread or process.

or

A client's representation of an object managed by the server.

See also: object  

In the context of asynchronous programming, the function that handles the completion of a request.

See also: asynchronous request  

A hyphen at which line wrapping cannot occur. It ensures that the enclosing word remains on the same line should a line break be required anywhere within the word. In this case, the word is moved to the next line.

See also: soft hyphen  

A space at which line wrapping cannot take place. It ensures that the enclosing characters or words remain on the same line. Should a line break be required anywhere within the group of characters or words, they are moved to the next line.

A bitmap that can be drawn to by graphics acceleration hardware.

This is a small, fixed length value generated by a function that has the property that different values for the data result in different hash values. The hash is encrypted using a private key to create the digital signature.

The manufacturer that first defined the Standard AT Command Set for modems.

See also: Hayes TSY  

The ETel TSY that supports Hayes modem commands.

See also: Hayes  

For Bluetooth, the Host Controller Interface (HCI) driver packages the higher level components to communicate with the hardware.

Text repeated at the top of every printed page.

See also: footer  

A file or directory attribute. Assigned to files or directories that should not normally be visible to the user.

See also: attribute  

If hidden, applications run in the background.

See also: application capabilities  application information file  

In the context of serial communications, when this point is passed in a receive buffer, a flow control suspend event is triggered.

See also: XOFF  

Help file.

The current location of the user. It is used to set variables such as UTC offset and summer time zones.

See also: default country  UTC  

The date and time taking into account both daylight saving if in effect and the current time zone's offset from Universal time.

See also: universal time  

A concrete control that contains a number of option buttons arranged horizontally. It is used to toggle mutually exclusive application states.

See also: option button  

A key press combination that sends a command. Usually this is to provide a short-cut to a menu option (e.g., ctrl+S for File | Save).

See also: command  

A table maintained by the UIKON framework for each application. It contains a list of all hotkeys, together with the commands they invoke, as defined in the application resource file.

See also: application resource file  

The part of a line which should be positioned at a specified height.

See also: line  

Common C++ or resource header, for inclusion in either type of source file.

The Bluetooth Headset Profile. It allows a headset to be wirelessly connected to a device for audio input and output.

HyperText Transfer Protocol, the underlying protocol used by the World Wide Web.

Hand writing Recognition Framework. Symbian OS allows different handwriting recognisers to be plugged in to a general framework for use.