Topics include Web Development, Audio, Video, Graphics, Software and Hardware. See also the Music Glossary.

r
- radio button
- radio frequency
- radio frequency identification
- radio frequency interference
- RAID
- rail-switcher
- rainbow series
- RAM
- RAMDAC
- random
- random access
- random access memory
- Random Access Memory Digital-to-Analog Converter
- rarefaction
- raster
- raster graphics
- raster image processor
- rasterize
- ray tracer
- RCA connector
- RCA phono jack
- R-DAT
- reactance
- read-only memory
- RealAudio
- RealMedia
- realtime
- realtime counter
- Realtime Streaming Protocol
- Realtime Transfer Protocol
- reboot
- receiver
- recompress
- reconstruction filter
- record
- Recording Industry Association of America
- rectifier
- recursive
- Red Book for PostScript
- Red Book standard
- red-green-blue
- redundancy
- redundant arrays of independent disks
- Reed-Solomon Code
- reference level
- reference noise
- reflected light
- reflector
- refresh rate
- regular expression
- relational database
- relative path
- relay
- remote control
- remote production unit
- render
- repeater
- replicate
- request
- Request For Comments
- resistance
- resolution
- resource fork
- reverb
- reverberation time
- reverse engineering
- RF
- RFC
- RFI
- RFID
- RGB
- rheostat
- RIAA
- RIAA equalization curve
- Rich Text Format
- RMS
- roaming
- robot
- Rock Ridge Format
- roll
- roll-off
- ROM
- root directory
- Root Mean Squared
- rotating digital audio tape
- rotational latency
- rough cut
- router
- Routing Information Protocol
- RS
- RTF
- RTP
- RTSP
- rule of thirds
- runtime code