| AA | More Than One Year |
| AB | First Six-Month Period |
| AC | Second Six-Month Period |
| AD | Average Daily |
| AE | Under One Year |
| AF | Next Three Months |
| AM | Average Monthly |
| AN | Annual |
| AP | Academic Period |
| AY | Average Year |
| BD | Buyer's Manufacturing Days |
| BM | Bimonthly |
| BW | Bi-weekly |
| CC | Cycles Periodic cycling of extreme levels of a variable |
| CY | Calendar Year |
| DA | Calendar Days |
| DW | Work Days |
| DY | Day |
| EL | Option Period at End of Lease |
| F1 | Fiscal Year Plus One Year |
| F2 | Fiscal Year Plus Two Years |
| FY | Fiscal Year |
| HR | Hours |
| ID | Inception to Date |
| KK | Maximum Calendar Days |
| KL | As Required |
| LN | Lease Termination Notification Period |
| LT | Lease Term |
| MD | Month to Date |
| MI | Minutes |
| MO | Month |
| MS | Mean Time Between Stops Measure of the average time interval between an item or product stop; a noncatastrophic event |
| MT | Mean Time Between Failure Measure of the average time interval between an item or product failure; a catastrophic event |
| NX | Next Six Months |
| PA | Plan Year to Date |
| PD | Period to Date |
| PM | Preceding 12 Months |
| PR | Preceding Six Months |
| Q1 | First Quarter |
| Q2 | Second Quarter |
| Q3 | Third Quarter |
| Q4 | Fourth Quarter |
| QY | Quarter of a Year |
| SA | Semiannual |
| SD | Seller's Manufacturing Days |
| SH | Shift |
| SM | Semimonthly |
| SP | Summer Period |
| TY | Tax Year |
| WK | Weeks |
| WW | Work Week |
| WY | Weekly |
| YD | Year to Date |
| ZZ | Mutually Defined |