| Apollo | Appeal | Appellate court |
| Apollo 11The Apollo 11 mission was the first manned lunar landing. It was the fifth manned mission in the Apollo program. That's one small step for [a] man, one giant leap for mankind. Neil Armstrong Crew Neil Armstrong (2), commander (and first to walk on the moo | Apollo 8Apollo 8 was a manned mission of the Apollo space program. Apollo 8 was the first mission that carried humans beyond Earth orbit, and the first time anyone was closer to another celestial body than they were to Earth. Crew Frank Borman (2), commander Jame | ApialesApiaceae ( carrot family) Araliaceae ( ginseng family) Pittosporaceae Griseliniaceae Torriceliaceae The Apiales are an order of flowering plants. The families given at right are typical of newer classifications, though there is some slight variation, and |
| Apocalypse NowApocalypse Now is a film by Francis Ford Coppola, based loosely on Joseph Conrad's novella Heart of Darkness but set in the Vietnam War, in which a taciturn American soldier is sent to kill (or rather "terminate with extreme prejudice") a rogue US special | Aphex TwinAphex Twin (born Richard David James 1971) is a UK-based electronic music artist, credited with pushing forward the genres of techno, ambient, IDM, acid, drum and bass (specifically drill n bass). Recent experimentation on his album drukqs included use of | Apple ComputerApple Computer, Inc. is a Silicon Valley company based in Cupertino, California, whose main business is computer technologies. Best known for its range of Macintosh computers and, more recently, its iPod personal audio ( MP3 and otherwise) player and iTun |
| Apple NewtonNewton was one of the world's first personal digital assistants (PDA). Developed by Apple Computer and sold from 1993 to 1998, it was based on the ARM processor, and featured handwriting recognition. Apple's official name for the device was MessagePad the | April 1st RFCEvery April 1st since 1989, the Internet Engineering Task Force has published one or more humorous RFC documents, following in the path blazed by the June 1973 RFC titled ARPAWOCKY . List RFC 527 ARPAWOCKY R. Merryman, UCSD; 22 June 1973; a Lewis Carroll | ApiaceaeSee text Ref: The Apiaceae the carrot or parsley family, are a family of usually aromatic plants with hollow stems, including parsley, carrot, and other relatives. They were originally called the Umbelliferae, due to the inflorescence in the form of a com |
| Applied ethics | April | April 4 |
| April 6 | April 12 | April 15 |
| April 30 | Applied statistics | Apartheid |
| APL | Aphrodite | April 1 |
| Applet | April 26 | Apocrypha |
| April 16 | Apache Software Foundation | Apple I |
| Apatosaurus | Applied mathematics | Apostle |
| April 29 | APL programming language | April 13 |
| April 28 | April 22 | Apollo 13 |
| Apollo 7 | Apollo 9 | April 2 |
| April 9 | Apuleius | April 18 |
| April 23 | Approval voting | April 14 |
| Apus | Approximant consonant | Apparent magnitude |
| Apollo 1 | Apollo 10 | Apollo 12 |
| Apollo 14 | Apollo 15 | Apollo 16 |
| Apollo 17 | April 17 | Aphasia |
| Applesoft BASIC | Apple II family | Apple III |
| April 5 | April 20 | April 19 |
| Apicomplexa | April 8 | Apostolic Succession |
| April 3 | Apostle Titus | April 27 |
| April 11 | Application programming interface | Apple Macintosh |
| Apoptosis | April 21 | Appendix |
| April 10 | Apache (disambiguation) | Apache HTTP Server |
| Apollos | April 25 | April 24 |
| April 7 | Apeiron | Apollinarism |
| April, May, and June Duck | Apostles Creed | Appeal to authority |
| April 2002 | Apostolicam Actuositatem | Aperture-to-medium coupling loss |
| Apparent power | Apulia | Applesauce |
| April Fool's Day | April 1, 2002 | Apollo asteroid |
| Aperture | Appian way | Apostasy |
| Applied kinesiology | Apple Darwin | Apron |
