 | Apache Cassandra Apache Cassandra is an open source distributed database management system designed to handle large amounts of data across many commodity servers, providing high availability with no single point of f… |
 | Apache Hadoop logo Apache Hadoop is an open-source software framework for storage and large-scale processing of data-sets on clusters of commodity hardware. Hadoop is an Apache top-level project being built and used by… |
 | Aphex Twin logo Aphex Twin, the London-based producer, whose real name is Richard David James, is recognised for his amorphic logo – created by graphic designer Paul Nicholson – that vaguely resembles the letter "A". |
 | Apocalyptic Trees, Merlán, Galicia Symbols carved on the lintel above the South Door of the Church of San Salvador, Merlán, Galicia, Spain |
 | Apostrophe The apostrophe ( ’ although often rendered as ' ) is a punctuation mark, and sometimes a diacritic mark, in languages that use the Latin alphabet or certain other alphabets. |
 | Apple One of the most symbolic of all fruits, apples have held a central place in the traditions of many cultures. |
 | Apple Logo Apple's first logo, designed by Ron Wayne, depicts Sir Isaac Newton sitting under an apple tree. It was almost immediately replaced by Rob Janoff's "rainbow Apple", the now-familiar rainbow-colored s… |
 | Apple of Discord "apple of discord" is used to signify the core, kernel, or crux of an argument, or a small matter that could lead to a bigger dispute. |
 | Apple Symbol () The Apple logo, which can be accessed by pressing option-shift-K on a Mac. |
 | Approaches the Limit Specifies the value that a function, or sequence, "approaches". |
 | Approximately equal A wavy symbol used to denote items that are approximately equal. |
