Information Management


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P

There are 410 entries in the glossary.
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Term Definition
P ListStorage products. SCSI Term. This list contains the position of all the defects which were found before the disk left the factory and is stored in the system area of the disk. The defective areas in the P list are the permanent defects and accordingly must be reflected in the alternate block allocation. Can be read with the READ DEFECT DATA command. (0x37)
 
P-ROMOptical. Partial Read Only Memory. Only part of the optical disk is stamped with unchangeable data, leaving the rest to be written to or erased at will.
 
PC AT InterfaceComputer interfaces. The extension bus for IBM personal computers and their compatibles. The PC AT bus is a 16-bit data bus supporting 24-bit address bus. The address bit of the drive consists of 5 bits after decoding by the host adapter.
 
PCAGeneral computing. Printed Circuit Assembly. Also known as Printed Circuit Board (PCB)
 
PDFThe Portable Document Format is an industrial standard, introduced to the market by Adobe, and suitable for the preservation and distribution of documents. In the PDF-format, in addition to the content of the document, the layout is retained in such a way that the form of the document is identical when it is printed out via a printer or a monitor.
 
Peer-To-PeerNetworking. Network characterised by having no centralised control over access to resources. Computers on such a network may be both clients (using resources) and servers (sharing resources).
 
Petabyte (PB)
One Petabyte (PB) = 1,000,000,000,000,000 bytes (decimal)

                                  1,125,899,906,842,624 bytes (binary)

 
PKIPublic Key Infrastructure is the set of security devices that enable the use and management of public-key cryptography and certificates.
 
PortalA special web page that organises access to all of the online resources about a topic, providing a one-stop shop of sorts.
 
Positioning TimeStorage products. The total of the seek time and average latency time. PR4ML Storage products Partial Response class 4 Maximum Likelihood
 
PreservationProcesses and operations involved in ensuring the technical and intellectual survival of authentic records through time.
 
PRINCE2Projects IN a Contollled Environment is a best practise project management methodology that is an open method, that is, there is no licensing fee. Furthermore there is an established, freely available pool of existing knowledge based on previous experience. PRINCE2 leans on common sense whilst utilising subtle, but effective, control mechanisms.
 
Process ColoursPrinters / Scanners. The four colours (cyan, magenta, yellow and black) that are combined to print a wide range of colours. When blended, these reproduce only a small portion of all the colours found in nature, but they can reproduce the widest range with the fewest inks when printing. See also CMYK.
 
Processesthe functions performed by users or users aided by information systems which generate, transform, modify, collect, organize, present, transfer, and destroy information.
 
ProjectA program of related activities and resources to achieve a specific objective, and which has a defined beginning and a definite end (i.e. a finite life-span). In the Research Information Applications Development Section (Sandwich), it is taken to refer to the development work to implement a computerised system, terminating on release of the system to users.
 
ProtocolGeneral computing. A protocol is a standardised set of rules that specify how a conversation is to take place, including the format, timing, sequencing and/or error checking.
 
ProvenanceThe source (person or organisation) of origin of the records and their proven custodial history. The archival principle of provenance requires that archives from different sources should not be intermixed.
 


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Glossary V1.8
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