CI

1. Calcineurin Inhibitor (immunosuppressor)
2. California State University, Channel Islands
3. Call Indicator
4. Call Intercept
5. Caller ID
6. Call-In
7. Canadian Idol (TV show)
8. Canadian Institute (Ontario, Canada)
9. Canary Islands
10. Capital Investment
11. Carbonia-Iglesias
12. Card Input
13. Cardiac Index
14. CARE International (global humanitarian organization)
15. Caritas Italiana (Italian charity)
16. Carnegie Institute
17. Carrier Interferometry
18. Carrington Institute (fictional, gaming)
19. Cast Iron
20. Catalogue Item
21. Catcher's Interference (baseball)
22. Categorical imperative
23. Cayman Islands
24. Cell ID
25. Center Island
26. Central Impression (printing press with only one impression cylander & multiple colors)
27. Central Index
28. Central Indiana
29. Central Instance (SAP)
30. Central Islip (Long Island, New York)
31. Cerebral Insufficiency
32. Certificate of Identity (various nations)
33. Certificate of Insurance
34. Certificate of Interpretation
35. Certification Inspection
36. Certified Investigator
37. Cervical Incompetence
38. Channel Interface
39. Channel Islands
40. Channel Islands (UK)
41. Channel Islands High School
42. Channel Islands of California
43. Characteristic Impedance
44. Charge Injection
45. Chassis Interface
46. Check In (IBM)
47. Chemical Injection
48. Chemical injury syndrome
49. Chemical Ionization
50. Chemonics International
51. Chief Inspector, a police rank
52. Chile
53. China Airlines - Taiwan (IATA airline code)
54. Chlorine Institute
55. Chris Isaak (musician)
56. Christic Institute (Malibu, CA)
57. Christmas Island
58. Chronic illness
59. Ci County
60. Ci protein,
61. Circuit Integrity
62. Circuit Interrupter
63. Cirrus (cloud formation)
64. City (IRB)
65. City Inspector
66. Civilian Instructor (UK Air Cadets)
67. Civilian Internee
68. Clandestine Industries (band)
69. Client Inquiry
70. Clinical Instructor
71. Clinical Investigation
72. Clock Input
73. Cluster Interconnect
74. Cochlear implant
75. Cochlear Implant (audiological device that restores hearing to the deaf)
76. Cocos (Keeling) Islands
77. Cocos Island
78. Code Inspection
79. Coded Information
80. Coeficiente Intelectual (Spanish: Intelligence quotient)
81. Cognition and Instruction (journal)
82. Cognitive Impairment
83. Colegio de Ingenieros de Chile
84. Collective Intelligence
85. Collegiate Institute
86. Colour Index
87. Combat Identification
88. Combat Ineffective
89. Combat Intelligence
90. Combustion Institute
91. Command Information
92. Command Inspection
93. Command Interpreter
94. Commercial Intelligence
95. Commercial Invoice
96. Commercial Items (FAR Part 12)
97. Commissariat à l'Information du Canada (Office of the Information Commissioner of Canada)
98. Common Interface
99. Commonweal Institute
100. Communications Interface
101. Communications International
102. Communist International (also COMINTERN or Third International)
103. Community Informatics
104. Community Involvement
105. Community of Interest
106. Companion of the Order of the Crown of India
107. Compassion International (relief charity)
108. Competitive intelligence
109. Complete Integration
110. Complex Industries (APICS course)
111. Complexity Index (Indiana school funding formula)
112. Complexity International (journal)
113. Compliance Inspection (USAF)
114. Component Instrumentation
115. Compounded Interest
116. Compression Ignition
117. Computer Intelligence (Division of Ziff Davis)
118. Computer Interconnect
119. Computer Interface
120. Computers in Industry (journal)
121. Comunità Incontro (Italian: community encounter)
122. Condition Index
123. Conducted Interference
124. Coney Island
125. Coney Island (Brooklyn, NY, USA)
126. Confidence Interval
127. Confidential Informant
128. Confidential Intermediary (adoption)
129. Configuration Inspection
130. Configuration Interaction
131. Configuration Item
132. Congestion Indicator (ATMF)
133. Connected Intelligence
134. Connection Identifier
135. Conservación Internacional (Spanish: Conservation International)
136. Conservation International
137. Consistency Index
138. Construction Inspector
139. Constructive Interference (physics)
140. Consular Invoice
141. Consumer Influence
142. Consumers' International
143. Consumers International (UK)
144. Containment Integrity
145. Containment Isolation
146. Content Identifier
147. Contents Inventory (insurance)
148. Contextual Inquiry
149. Continual improvement
150. Continuous Improvement (business quality/productivity assurance)
151. Continuous Integration
152. Contour Interval
153. Contract Investigator
154. Contract Item
155. Contraindicated
156. Contraindication
157. Control Indicator
158. Control Instrumentation
159. Control Interface
160. Control Interval
161. Controlled Introduction
162. Controlled Irrigation
163. Convergence insufficiency
164. Cook Inlet
165. Cooper Institute
166. Cooperazione Italiana (Italian Cooperation)
167. Coordinating Installation
168. Copy Instruction
169. Copyright Infringement
170. Core Infrastructure
171. Corner Infielder (baseball; 1st or 3rd baseman)
172. Corporate Identity
173. Corporate Information
174. Corporate Investment
175. Correctional Industries (Nebraska)
176. Correctional Institution
177. Corrosion Inhibitor
178. Cost & Insurance
179. Cost Incurred
180. Cost Index
181. Cote d'Ivoire (country code, top level domain)
182. Cotton Incorporated
183. Counselor Intern
184. Count Indicator
185. Counterinsurgency
186. Counterintelligence
187. Counterpart International
188. Course Indicator
189. Cowl Induction
190. Craft Interface
191. Crazy Ivan (Soviet submarine maneuver)
192. Crew Interface
193. Crime & Investigation (TV series)
194. Criminal Informant
195. Criminal Intent (Law & Order TV series)
196. Criminal Investigation
197. Criminal Investigator
198. Crimson Idol (W.A.S.P music album)
199. Crisis Intervention
200. Critical Illness
201. Critical Indicator
202. Critical Information
203. Critical Infrastructure
204. Critical Injury
205. Critical Instant
206. Critical Intelligence
207. Critical Interface
208. Critical Issues
209. Critical Item
210. Cubic Inch
211. Cubitus interruptus -protein
212. Cumulative Incidence (epidemiology)
213. Curie
214. Current Interrupt
215. Curriculum Inquiry
216. Customer Information
217. Customer Installation
218. Customer Integration
219. Customer Intelligence
220. Customer Interface
221. Schedule I Controlled Substance (USA)