4D

4D or 4-D primarily refers to:

4-dimensional spacetime: three-dimensional space of length, width, and height, plus time.
Four-dimensional space

(We do not know much about 4d. Some or all of this could be false). 4d is a hard thing to think about. Some might think that it is about time. If you think about it, a 2d person can only see part of a 3d shape. To a 2d person, a sphere would get larger, and then smaller if it moves to the left. To us, a 4d shape could look like a cube, with many jagged and random holes. But as the cube moves, some holes are filled, and new holes are made.

4d can also be related to:

Computers and photography

4D (software), a complete programming environment including database and web server
- 4D SAS, developers of 4D and Wakanda
- 4D Inc, a US-based subsidiary of 4D SAS
4D BIM, a term used in computer aided design
4D printing
Cinema 4D, a commercial cross platform 3D graphics application
SGI IRIS 4D, a line of workstations from Silicon Graphics
4D, a photo print size for digital cameras

Arts and entertainment

4D (album), a 2010 album by Matthew Shipp
"4-D" (The X-Files), an episode of The X-Files
4D Audio Recording system, an audio recording system developed by Deutsche Grammophon
4D film, a high technology film experience augmented with physical or environmental effects
4DTV, a satellite TV broadcasting technology from Motorola
4DX, a 4D film format
"4D", a song by Grand Mixer DXT and Bill Laswell from Aftermathematics (2003)
"4D", a song by Northlane from Alien (2019)
4D, the production code for the 1975 Doctor Who serial Revenge of the Cybermen

Other

Class 4-D, a classification of the Selective Service System
4-D (psychedelic), a psychedelic drug
4D (train) in Melbourne, Australia
4-Digits, a lottery in Malaysia and Singapore
Air Sinai (IATA: 4D)
Ring finger, the fourth digit (abbreviated 4D) of the hand
Potez 4D, a four-cylinder aircraft engine

Computers and photography

Arts and entertainment

Other

See also