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Monday, February 20, 2012

Symbian Terminologies : Terms beginning with H

H

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

handle
A handle is a way of identifying an object that is owned or managed by another thread or process. orA client's representation of an object managed by the server.

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

hard hyphen
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.

hard space
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.

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

hash
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.

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

Hayes TSY
The ETel TSY that supports Hayes modem commands.

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

header
Text repeated at the top of every printed page.

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

hidden capability
If hidden, applications run in the background.

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

hlp file
Help file.

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

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

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

hotkey
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).

hotkey table
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.

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

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

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

HTTP
HyperText Transfer Protocol, the underlying protocol used by the World Wide Web for data transfer.

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