| English | German |
| red/black tree | Rot-Schwarz-Struktur (A binary search tree which uses a one-bit flag on each node to identify the node by color: either red or black. A set of constraints on node color helps form an approximately balanced binary tree) |
| Red Book audio | Red Book-Audio (A standard compact disc format developed by Philips and Sony) |
| Red Book audio format | Red Book-Audioformat (A standard compact disc format developed by Philips and Sony) |
| red eye | rote Augen (A photographic condition where the eyes of the subject appear red, due to the reflection of the camera flash from their eyes) |
| Red filter | Rotfilter (A filter that is used in B&W photography. Increases contrast more than any other filter) |
| red gain | Rotverstärkung (The factor by which the red pixel value has to be multiplied to achieve R=G=B values) |
| red-green-blue | Rot-Grün-Blau (A color model that describes color information in terms of the red (R), green (G), and blue (B) intensities that make up the color) |
| red-green-blue | Rot-Grün-Blau (A color model that describes color information in terms of the red (R), green (G), and blue (B) intensities that make up the color) |
