Paid Inclusion -- Advertising program where pages are guaranteed to be included in a search engine's index in exchange for payment, though no guarantee of ranking well is typically given. For example, Looksmart is a directory that lists pages and sites, not based on position but based on relevance. Marketers pay to be included in the directory, on a CPC basis or per-URL fee basis, with no guarantee of specific placement. Also see XML Feeds.
Paid Listings -- Listings that search engines sell to advertisers, usually through paid placement or paid inclusion programs. In contrast, organic listings are not sold.
PB - PETABYTE - 1x1015 - One times ten to the fifteenth power Bytes = 1 Trillion Megabytes
PDA -- Personal Digital Assistant
PDF -- Portable Document Format (file.pdf)
Perl -- Short for Practical Extraction and Report Language, Perl is a programming language developed by Larry Wall, especially designed for processing text. Because of its strong text processing abilities, Perl has become one of the most popular languages for writing CGI scripts. Perl is an interpretive language, which makes it easy to build and test simple programs.
PFI -- Pay For Inclusion
PFP -- Pay For Performance
--Pay For Placement
PHP -- Self-referentially short for PHP: Hypertext Preprocessor, an open source, server-side, HTML embedded scripting language used to create dynamic Web pages. In an HTML document, PHP script (similar syntax to that of Perl or C ) is enclosed within special PHP tags. Because PHP is embedded within tags, the author can jump between HTML and PHP (similar to ASP and Cold Fusion) instead of having to rely on heavy amounts of code to output HTML. And, because PHP is executed on the server, the client cannot view the PHP code. PHP can perform any task that any CGI program can do, but its strength lies in its compatibility with many types of databases. Also, PHP can talk across networks using IMAP, SNMP, NNTP, POP3, or HTTP. PHP was created sometime in 1994 by Rasmus Lerdorf. During mid 1997, PHP development entered the hands of other contributors. Two of them, Zeev Suraski and Andi Gutmans, rewrote the parser from scratch to create PHP version 3 (PHP3).
PICS -- Platform for Internet Content Selection
PL -- Polish (2 Letter Language Code)
PNG -- Portable Network Graphics (file.png)
POP -- Post Office Protocol
Portal -- Designation for websites that are either authoritative hubs for a given subject or popular content driven sites (like Yahoo) that people use as their homepage. Most portals offer significant content and offer advertising opportunities for relevant sites
PPC -- Pay Per Click
PPCSE -- Pay Per Click Search Engines
PR -- Google PageRank™
PR0 -- PageRank Zero
PSA -- Public Service Ad
PSD -- PhotoShop Document (file.psd)
PT -- Portuguese (2 Letter Language Code)
PubCon -- WebmasterWorld Publishers Conference
PWD -- People with Disabilities
