 | O Semaphore character meaning O |
 | o (basic Telugu script) |
 | ō (basic Telugu script) |
 | ō (Bengali script) |
 | O (Oscar) "Man overboard." (often attached to the man overboard pole on boats). With a sinister hoist, the semaphore flag. |
 | o (Tamil script) |
 | Oak In many parts of ancient Europe, the oak tree was a revered symbol and associated with numerous deities. Besides the tree itself, individual components such as acorns and leaves hold their own unique… |
 | Oakland Athletics Logo From 1994 until 2013, the A's wore green alternates jerseys with the word "Athletics" in gold. It was used on both road and home games. During the 2000s, the Athletics introduced black as one of thei… |
 | Oakland Raiders American football team. |
 | Oakland Raiders Logo When the team was founded in 1960, a "name the team" contest was held by the Oakland Tribune. The winning name was the Oakland Señors. After a few days of being the butt of local jokes (and accusatio… |
 | OAuth logo The OAuth logo, designed by Chris Messina. |
 | Obelisk The obelisk is an architectural feature that originated in ancient Egypt. Although simple in design, the crafting and transportation of these monolithic masterpieces was a highly involved process, an… |
 | Object replacement character The object replacement character (), sometimes used to represent an embedded object in a document when it is converted to plain text. |
 | Obsidian Obsidian is one of nature’s more curious products. Smooth to the touch, it can hold a razor sharp edge, but cracks and flakes under less pressure than most other stones. Nonetheless, it has a very lo… |
 | Obsidian Dragon egg Icon used to indicate an Obsidian Dragon egg in the game DragonVale. |
 | Octagon In geometry, an octagon (from the Greek ὀκτάγωνον oktágōnon, "eight angles") is a polygon that has eight sides. |
 | Octagram In geometry, an octagram is an eight-sided star polygon. |
 | Octave clef Treble and bass clefs can also be modified by octave numbers. |
 | Octopus (Apple iOS 12.2) |
 | Oden (Samsung One UI 1.5) |
 | Odo Nyera Fie Kwan Love never loses its way home. |
 | Off symbol IEC 5008, the power off (circle) symbol on a button or toggle, indicates that using the control will disconnect power to the device. It comes from the binary system (0 means off). |
 | Off-Page Connector A connector is used to represent that the flow is continued elsewhere in the flowchart on a different page. Typically capital letters are used in the circle as labels. |
 | Office of the Independent Police Review Director OIPRD |
 | Office of the Joint Chiefs of Staff Identification Badge The Office of the Joint Chiefs of Staff Identification Badge is a U.S. Military badge presented to the members of the Joint Chiefs of Staff upon appointment to position as either a Service Head, Vice… |
