DDK Glossary - P
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(Redirected from Program group)
- palette
- A list of colors assigned to various areas on a panel. A user can change the color of these areas.
- PDD
- Physical Device Driver.
- PDE
- PageDirectoryEntry.
- pel
- Picture element.
- permissible action
- In a conceptual schema language, an action conforming to specified rules or constraints that changes a presumably consistent collection of sentences into a consistent one or makes known a consistent one present in the information base or conceptual schema.
- phase alignment
- Aligning source bits with destination bits. Often required in a Bitblt function move operation where byte blocks are moved on bit boundaries.
- physical address
- A 32-bit byte address giving the actual address in physical storage for a data item.
- physical device driver (PDD)
- A system interface that handles hardware interrupts and supports a set of input and output functions.
- pipe
- See named pipe, unnamed pipe.
- picture element (pel, pixel)
- In computer graphics, the smallest element of a display surface that can be independently assigned color and intensity. (T)
- The area of the finest detail that can be reproduced effectively on the recording medium.
- An element of a raster pattern about which a toned area on a photoconductor can appear.
- PIO
- Programmed I/O.
- pixel
- Picture element.
- polyfillet
- A curve based on a sequence of lines. The curve is tangential to the end points of the first and last lines, and tangential also to the midpoints of all other lines.
- polyline
- In computer graphics, a sequence of adjoining lines.
- pop
- To remove an item from the top of a pushdown list. Contrast with push.
- prefetch
- To locate and load a quantity of data in anticipation of a request.
- presence-check function
- A Ring 3 (non-privileged) .EXE program that determines whether a given hardware interface is present on a workstation.
- PRESENCECHECK
- A keyword, interpreted by the DDINSTAL utility, to determine whether to process the device driver profile file, based on the return code from PRESENCECHECK.
- printer driver
- A file that describes the physical characteristics of a printer, plotter, or other peripheral device, and is used to convert graphics and text into device-specific data at the time of printing or plotting.
- Print Manager
- In the Presentation Manager, the part of the spooler that manages the spooling process. It also allows the user to view print queues and to manipulate print jobs.
- privilege level
- A method of protection that allows only certain program instructions to be used by certain programs.
- program group
- Several programs that can be acted upon as a single entity.
- protect mode
- A method of program operation that limits or prevents access to certain instructions or areas of storage. Contrast with real mode.
- push
- To add an item to the top of a pushdown list. Contrast with pop.