Flashcard Exchange is a great website which has several categories of CompTIA flashcards to study online and it\'s also available on iTunes App Store.

CompTIA Flashcards: http://www.flashcardexchange.com/tag/comptia

CompTIA Acronyms Flashcards: click here
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CompTIA Acronyms v1.5
Source: http://certification.comptia.org/a/prepare.aspx

1. AC alternating current
2. ACPI advanced configuration and power interface
3. ACT activity
4. ADSL asymmetrical digital subscriber line
5. AGP accelerated graphics port
6. AMD advanced micro devices
7. AMR audio modem riser
8. APIPA automatic private internet protocol addressing
9. APM advanced power management
10. ARP address resolution protocol
11. ASR automated system recovery
12. AT advanced technology
13. ATA advanced technology attachment
14. ATAPI advanced technology attachment packet interface
15. ATM asynchronous transfer mode
16. ATX advanced technology extended
17. BIOS basic input/output system
18. BNC Bayonet-Neill-Concelman or British Navel Connector
19. BRI basic rate interface
20. BTX balanced technology extended
21. CCD charged coupled device
22. CD compact disc
23. CD-ROM compact disc-read-only memory
24. CD-RW compact disc-rewritable
25. CDFS compact disc file system
26. CMOS complementary metal-oxide semiconductor
27. CNR communication network riser
28. COM1 communication port 1
29. CPU central processing unit
30. CRIMM continuity-rambus inline memory module
31. CRT cathode-ray tube
32. DAC discretionary access control
33. DB-25 serial communications D-shell connector, 25 pins
34. DB-9 9 pin D shell connector
35. DC direct current
36. DDOS distributed denial of service
37. DDR double data-rate
38. DDR RAM double data-rate random access memory
39. DDR SDRAM double data-rate synchronous dynamic random access memory
40. DFS distributed file system
41. DHCP dynamic host configuration protocol
42. DIMM dual inline memory module
43. DIN Deutsche Industrie Norm
44. DIP dual inline package
45. DLT digital linear tape
46. DLP digital light processing
47. DMA direct memory access
48. DNS domain name service or domain name server
49. DOS disk operating system or denial of service
50. DPMS display power management signaling
51. DRAM dynamic random access memory
52. DSL digital subscriber line
53. DVD digital video disc or digital versatile disc
54. DVD-RAM digital video disc-random access memory
55. DVD-ROM digital video disc-read only memory
56. DVD-R digital video disc-recordable
57. DVD-RW digital video disc-rewritable
58. DVI digital visual interface
59. ECC error correction code
60. ECP extended capabilities port
61. EEPROM electrically erasable programmable read-only memory
62. EFS encrypting file system
63. EIDE enhanced integrated drive electronics
64. EISA extended industry standard architecture
65. EMI electromagnetic interference
66. EMP electromagnetic pulse
67. EPROM erasable programmable read-only memory
68. EPP enhanced parallel port
69. ERD emergency repair disk
70. ESD electrostatic discharge
71. ESDI enhanced small device interface
72. EVGA extended video graphics adapter/array
73. EVDO evolution data optimized or evolution data only
74. FAT file allocation table
75. FAT12 12-bit file allocation table
76. FAT16 16-bit file allocation table
77. FAT32 32-bit file allocation table
78. FDD floppy disk drive
79. FERPA Family Educational Rights and Privacy Act
80. Fn Function (referring to the function key on a laptop)
81. FPM fast page-mode
82. FRU field replaceable unit
83. FTP file transfer protocol
84. FQDN fully qualified domain name
85. GB gigabyte
86. GDI graphics device interface
87. GHz gigahertz
88. GUI graphical user interface
89. GPRS general packet radio system
90. GSM global system for mobile communications
91. HAL hardware abstraction layer
92. HCL hardware compatibility list
93. HDD hard disk drive
94. HDMi high definition media interface
95. HPFS high performance file system
96. HTML hypertext markup language
97. HTTP hypertext transfer protocol
98. HTTPS hypertext transfer protocol over secure sockets layer
99. I/O input/output
100. ICMP internet control message protocol
101. ICS internet connection sharing
102. ICR intelligent character recognition
103. IDE integrated drive electronics
104. IEEE Institute of Electrical and Electronics Engineers
105. IIS Internet Information Services
106. IMAP internet mail access protocol
107. IP internet protocol
108. IPCONFIG internet protocol configuration
109. IPP internet printing protocol
110. IPSEC internet protocol security
111. IPX internetwork packet exchange
112. IPX/SPX internetwork packet exchange/sequenced packet exchange
113. IR infrared
114. IrDA Infrared Data Association
115. IRQ interrupt request
116. ISA industry standard architecture
117. ISDN integrated services digital network
118. ISO Industry Standards Organization
119. ISP internet service provider
120. KB kilobyte
121. LAN local area network
122. LBA logical block addressing
123. LC Lucent connector
124. LCD liquid crystal display
125. LDAP lightweight directory access protocol
126. LED light emitting diode
127. LIP or LiPoly lithium-ion polymer
128. Li-on lithium-ion
129. LPD/LPR line printer daemon / line printer remote
130. LPT line printer terminal
131. LPT1 line printer terminal 1
132. LPX low profile extended
133. LVD low voltage differential
134. MAC media access control
135. MAN metropolitan area network
136. MAPI messaging application programming interface
137. Mb megabit
138. MB megabyte
139. MBR master boot record
140. MBSA Microsoft Baseline Security Analyzer
141. MCR multivariant curve resolution
142. MFD multi-function device
143. MFP multi-function product
144. MHz megahertz
145. MicroDIMM micro dual inline memory module
146. MIDI musical instrument digital interface
147. MIME multipurpose internet mail extension
148. MLI multiple link interface
149. MMC Microsoft management console
150. MMX multimedia extensions
151. MP3 Moving Picture Experts Group Layer 3 Audio
152. MPEG Moving Picture Experts Group
153. MSCONFIG Microsoft configuration
154. MSDS material safety data sheet
155. MUI multilingual user interface
156. NAS network-attached storage
157. NAT network address translation
158. NetBIOS networked basic input/output system
159. NetBEUI networked basic input/output system extended user interface
160. NFS network file system
161. NIC network interface card
162. NiCd nickel cadmium
163. NiMH nickel metal hydride
164. NLI not logged in or natural language interface
165. NLX new low-profile extended
166. NNTP network news transfer protocol
167. NTFS new technology file system
168. NTLDR new technology loader
169. NWLINK Netware Link
170. OCR optical character recognition
171. OEM original equipment manufacturer
172. OMR optical mark recognition
173. OS operating system
174. OSR original equipment manufacturer service release
175. PAN personal area network
176. PATA parallel advanced technology attachment
177. PC personal computer
178. PCI peripheral component interconnect
179. PCIe peripheral component interconnect express
180. PCIX peripheral component interconnect extended
181. PCL printer control language
182. PCMCIA Personal Computer Memory Card International Association
183. PDA personal digital assistant
184. PGA pin grid array
185. PGA2 pin grid array 2
186. PIN personal identification number
187. PKI public key infrastructure
188. PnP plug and play
189. POP post office protocol
190. POP3 post office protocol 3
191. POST power-on self test
192. POTS plain old telephone service
193. PPP point-to-point protocol
194. PPTP point-to-point tunneling protocol
195. PRI primary rate interface
196. PROM programmable read-only memory
197. PS/2 Personal System/2 connector
198. PSTN public switched telephone network
199. PVC permanent virtual circuit
200. PXE preboot execution environment
201. QoS quality of service
202. RAID redundant array of independent (or inexpensive) discs
203. RAM random access memory
204. RAS remote access service
205. RBAC role-based access control or rule-based access control
206. RDRAM RAMBUS® dynamic random access memory
207. RF radio frequency
208. RFI radio frequency interference
209. RGB red green blue
210. RIMM RAMBUS® inline memory module
211. RIP routing information protocol
212. RIS remote installation service
213. RISC reduced instruction set computer
214. RJ registered jack
215. RJ-11 registered jack function 11
216. RJ-45 registered jack function 45
217. RMA returned materials authorization
218. ROM read only memory
219. RS-232 or RS-232C recommended standard 232
220. RTC real-time clock
221. SAN storage area network
222. SATA serial advanced technology attachment
223. SC subscription channel
224. SCSI small computer system interface
225. SCSI ID small computer system interface identifier
226. SD card secure digital card
227. SDRAM synchronous dynamic random access memory
228. SEC single edge connector
229. SFC system file checker
230. SGRAM synchronous graphics random access memory
231. SIMM single inline memory module
232. SLI scalable link interface or system level integration or scanline interleave mode
233. SMB server message block or small to midsize business
234. SMTP simple mail transport protocol
235. SNMP simple network management protocol
236. SoDIMM small outline dual inline memory module
237. SOHO small office/home office
238. SP service pack
239. SP1 service pack 1
240. SP2 service pack 2
241. SPDIF Sony-Philips digital interface format
242. SPGA staggered pin grid array
243. SPX sequenced package exchange
244. SRAM static random access memory
245. SSH secure shell
246. SSID service set identifier
247. SSL secure sockets layer
248. ST straight tip
249. STP shielded twisted pair
250. SVGA super video graphics array
251. SXGA super extended graphics array
252. TB terabyte
253. TCP transmission control protocol
254. TCP/IP transmission control protocol/internet protocol
255. TDR time domain reflectometer
256. TFTP trivial file transfer protocol
257. UART universal asynchronous receiver transmitter
258. UDF user defined functions or universal disk format or universal data format
259. UDMA ultra direct memory access
260. UDP user datagram protocol
261. UL Underwriter’s Laboratory
262. UNC universal naming convention
263. UPS uninterruptible power supply
264. URL uniform resource locator
265. USB universal serial bus
266. USMT user state migration tool
267. UTP unshielded twisted pair
268. UXGA ultra extended graphics array
269. VESA Video Electronics Standards Association
270. VFAT virtual file allocation table
271. VGA video graphics array
272. VoIP voice over internet protocol
273. VPN virtual private network
274. VRAM video random access memory
275. WAN wide area network
276. WAP wireless application protocol
277. WEP wired equivalent privacy
278. WIFI wireless fidelity
279. WINS windows internet name service
280. WLAN wireless local area network
281. WPA wireless protected access
282. WUXGA wide ultra extended graphics array
283. XGA extended graphics array
284. ZIF zero-insertion-force
285. ZIP zigzag inline package

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Searching for A+ / Network+ / Security+ will bring up a plethora of results, allowing you to study many flashcard sets.