2. R6
3. RA (Registration Authority)
4. RAC (Remote Access Concentrator)
5. race hazard
6. rack
7. rack unit
8. rack-mount server
9. RAD (Rapid Application Development)
10. radio button
11. radio link (1)
12. radio link (2)
13. radio modem
14. radio relay
15. radiodetermination
16. radiometry
17. RADIUS (Remote Authentication Dial-In User Service)
18. radix
19. RADSL (Rate Adaptive DSL)
20. RAID (Redundant Array of Independent Disks)
21. RAM (Random-Access Memory)
22. RAMDAC (Random Access Memory Digital-to-Analog Converter)
23. random access
24. RapidIO
25. RAR (Remote Access Router)
26. RARP (Reverse Address Resolution Protocol)
27. RAS (1) (Remote Access Services)
28. RAS (2) (Remote Access Server)
29. RAS (3) (Registration, Admission and Signaling)
30. RAS (4) (Reliability Availability Serviceability)
31. RAS (5) (Row Address Strobe)
32. rasterize
33. Rational Rose
34. raw data
35. ray tracing
36. RC2000 (Radiocom 2000)
37. RC4 (ARCFOUR)
38. RC5 (Ron’s Code 5)
39. RC6 (Ron’s Code 6)
40. RCA connector
41. RCP (Remote Copy Protocol)
42. RCS (Remote Computer Service)
43. RCS (Revision Control System)
44. RDBMS (Relational Database Management System)
45. RDF (Resource Description Format)
46. RDF (Resource Description Framework)
47. RDO (Remote Data Objects)
48. RDP (Remote Desktop Protocol)
49. RDRAM (Rambus DRAM)
50. RDS (Radio Data System)
51. RDS (Remote Data Services)
52. RDSL (Rate-adaptive Digital Subscriber Line)
53. read
54. read access
55. read-only
56. read-only document
57. read-write head
58. real mode
59. real time
60. RealAudio
61. real-time clock
62. real-time processing
63. real-time system
64. reboot
65. receiver
66. reconfigure
67. record (1)
68. record (2)
69. recurring fees
70. recursion
71. recycle bin
72. Red Book
73. Red Hat
74. Red Hat Linux
75. redundancy (1)
76. redundancy (2)
77. referential integrity
78. ReFLEX
79. refresh (1)
80. refresh (2)
81. refresh rate
82. register (1)
83. register (2)
84. registrar
85. registry
86. registry key
87. regular expression
88. relation
89. relational database
90. relative transmission level
91. relay (1)
92. relay (2)
93. release (1)
94. release (2)
95. release notes
96. remote
97. remote access
98. remote computer
99. remote control (1)
100. remote control (2)
101. remote file
102. remote host
103. remote login
104. removable hard disk
105. rendering
106. repeater (1)
107. repeater (2)
108. repeater mode
109. replay
110. replay attack
111. replication
112. report
113. report generator
114. report writer
115. repository (1)
116. repository (2)
117. repudiation
118. request
119. requester
120. resampling
121. reserve account
122. reserved memory
123. reserved word
124. reset
125. reset button
126. residential gateway
127. resize
128. resizing
129. resolution (1)
130. resolution (2)
131. resolution (3)
132. resource (1)
133. resource (2)
134. resource allocation
135. Resource Management Software
136. response (1)
137. response (2)
138. response (3)
139. response time
140. restart
141. return (1)
142. return (2)
143. REXX (Restructured EXtended eXecutor)
144. RF (Radio Frequency)
145. RFC (Request For Comments)
146. RFC 1869
147. RFC 2131
148. RFID (Radio Frequency IDentification)
149. RG58
150. RG8
151. RGB (Red Green Blue)
152. RGBA (Red-Green-Blue-Alpha)
153. RGSS (Rotated Grid Super-Sampling)
154. ribbon cable
155. rich client
156. rich text (1)
157. rich text (2)
158. Rijndael algorithm
159. RIMM (Rambus Inline Memory Module)
160. ring
161. ring network
162. rip
163. RIP (Routing Information Protocol)
164. RIP (Raster Image Processor)
165. RIP (Remote Imaging Protocol)
166. RIPE NCC ( Réseaux IP Européens Network Coordination Centre )
167. ripper
168. RIR (Regional Internet Registry)
169. RISC (Reduced Instruction Set Computer)
170. RISC OS
171. riser card (1)
172. riser card (2)
173. RITL (Radio In The Loop)
174. RJ-11 (Registered Jack - 11) connector
175. RJ-21 (Registered Jack - 21) connector
176. RJ-45 (Registered Jack - 45) connector
177. RJ-48 (Registered Jack - 48) connector
178. RL (Real life (that is, when not chatting))
179. RLE (Run Length Encoding)
180. RLL (Radio Local Loop)
181. RLL (Run Length Limited)
182. RMI (Remote Method Invocation)
183. rn (ReadNews)
184. road-warrior
185. roamer
186. roaming (1)
187. roaming (2)
188. robot (1)
189. robot (2)
190. rogue AP (Access Point) (1)
191. rogue AP (Access Point) (2)
192. rogue site
193. roll back
194. rollover
195. ROM (Read-Only Memory)
196. ROM emulator
197. ROMable
198. root
199. root bridge
200. root directory
201. root domain (1)
202. root domain (2)
203. root server
204. root server system
205. rootkit
206. ROR (Raffing out roud)
207. RosettaNet
208. ROTFL (or ROFL) (Rolling on the floor laughing)
209. ROTFLMAO (Rolling on the floor laughing my a** off)
210. ROTFLMAOWPIMP (Rolling on the floor laughing my a** off while peeing in my pants)
211. ROTFLMBO (Rolling on the floor laughing my butt off)
212. route
213. router
214. routine
215. routing
216. routing control
217. routing table
218. row-level locking
219. RPC (Remote Procedure Call)
220. RPC server
221. RPG (Report Program Generator)
222. RPG (Role-playing games)
223. RPM (Red Hat Package Manager)
224. RPTV (Rear-Projection TeleVision)
225. RS/6000
226. RS-232C (Recommended Standard-232C)
227. RS-422, RS-423
228. RS-449
229. RS-485
230. RS-530
231. RSA (Rivest-Shamir-Adleman)
232. RSAREF
233. RSN (Real soon now)
234. RSS (Radio Service Software)
235. RSS (Really Simple Syndication, RDF Site Summary, Rich Site Summary)
236. RSS (Remote Switching System)
237. RSS (Route Selection Services)
238. RSS feed
239. RSSI (Received Signal Strength Indicator)
240. RSTP (Rapid Spanning Tree Protocol)
241. RSVP (Rapid Serial Visual Presentation)
242. RSVP (Resource Reservation Setup Protocol)
243. RTAM (Remote Terminal Access Method)
244. RTF (Rich Text Format)
245. RTFM (Read the f***ing manual)
246. RTM (Read The Manual)
247. RTOS (Real-Time Operating System)
248. RTP (Rapid Transport Protocol)
249. RTP (Realtime Transport Protocol)
250. RTS (Run-Time System)
251. RTSP (Real Time Streaming Protocol)
252. run (1)
253. run (2)
254. run time
255. runtime engine
256. runtime environment (1)
257. runtime environment (2)
258. run-time error
259. runtime library
260. run-time support
261. run-time, runtime
262. RUP (Rational Unified Process)
263. RxDOS
264. RYO (Roll your own (write your own program; derived from cigarettes rolled yourself with tobacco and paper))