| CIGAR | Compact Idiosyncratic Gapped Alignment Report 
| Others |
| CIGAR | Comparative International Governmental
| Others |
| CIGAR | Comparative International Governmental Accounting Research
| Others |
| CIGAR | Concise Idiosyncratic Gapped Alignment Report
| Others |
| CIGAR | Controls Instruments Gas Attitude Run
| Others |
| CIGAR | Covered In Ground Anaerobic Reactor
| Others |