The letter O

• Ob- /ob/ pref. Obligatory. A piece of netiquette
• Obfuscated C Contest (in full, the `International Obfuscated C
• obi-wan error /oh'bee-won` er'*r/ [RPI, from `off-by-one' and
• Objectionable-C n. Hackish take on "Objective-C", the name of
• obscure adj. Used in an exaggeration of its normal meaning, to
• octal forty /ok'tl for'tee/ n. Hackish way of saying "I'm
• off the trolley adj. Describes the behavior of a program that
• off-by-one error n. Exceedingly common error induced in many
• offline adv. Not now or not here. "Let's take this
• ogg /og/ [CMU] v. 1. In the multi-player space combat game
• old fart n. Tribal elder. A title self-assumed with remarkable
• Old Testament [C programmers] n. The first edition of K&R, the
• one-banana problem n. At mainframe shops, where the computers
• one-line fix n. Used (often sarcastically) of a change to a
• one-liner wars n. A game popular among hackers who code in the
• ooblick /oo'blik/ [from the Dr. Seuss title "Bartholomew
• op /op/ n. 1. In England and Ireland, common verbal
• open n. Abbreviation for `open (or left) parenthesis' --- used when
• Open DeathTrap n. Abusive hackerism for the Santa Cruz
• open switch [IBM prob. from railroading] n. An unresolved
• operating system [techspeak] n. (Often abbreviated `OS') The
• optical diff n. See vdiff.
• optical grep n. See vgrep.
• optimism n. What a programmer is full of after fixing
• Orange Book n. The U.S. Government's standards document
• oriental food n. Hackers display an intense tropism towards
• orphan [UNIX] n. A process whose parent has died; one inherited by
• orphaned i-node /or'f*nd i'nohd/ [UNIX] n. 1. [techspeak] A
• orthogonal [from mathematics] adj. Mutually independent; well
• OS /O-S/ 1. [{Operating System}] n. An abbreviation heavily
• OS/2 /O S too/ n. The anointed successor to MS-DOS for Intel
• out-of-band [from telecommunications and network theory] adj.
• overflow bit n. 1. [techspeak] A flag on some processors
• overflow pdl [MIT] n. The place where you put things when your
• overrun n. 1. [techspeak] Term for a frequent consequence of data
• overrun screw [C programming] n. A variety of {fandango oncore}

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The letter P