APS or Aps or aps or similar may refer to:
An Apsara (also spelled as Apsarasa) is a female spirit of the clouds and waters in Hindu and Buddhist mythology.
An apsis (Greek: ἁψίς; plural apsides /ˈæpsᵻdiːz/, Greek: ἁψῖδες) is an extreme point in an object's orbit.
Advanced Photo System type-C (APS-C) is an image sensor format approximately equivalent in size to the Advanced Photo System "classic" negatives of 25.1×16.7 mm, an aspect ratio of 3:2.
Apsley George Benet Cherry-Garrard (2 January 1886 – 18 May 1959) was an English explorer of Antarctica.
Apsley House, also known as Number One, London, is the London townhouse of the Dukes of Wellington. It stands alone at Hyde Park Corner, on the south-east corner of Hyde Park, facing south towards the busy traffic roundabout in the centre of which stands the Wellington Arch.
In architecture, an apse (from Latin absis: "arch, vault" from Greek ἀψίς apsis "arch"; sometimes written apsis; plural apsides) is a semicircular recess covered with a hemispherical vault or semi-dome, also known as an Exedra.
In celestial mechanics, perihelion precession, apsidal precession or orbital precession is the precession (rotation) of the orbit of a celestial body.
Apse (pronounced "apps") was an American rock band signed to the UK label ATP Recordings  and Spanish label Acuarela Discos.
The APS underwater assault rifle (APS stands for Avtomat Podvodny Spetsialnyy (Автомат Подводный Специальный) or "Special Underwater Assault Rifle") is an underwater firearm designed by the Soviet Union in the early 1970s.