| EIN | Employer Identification Number | Employer identification number. | |
| FisYr | Fiscal year | Fiscal year (ending year) | |
| NAME | Name. | Name. | |
| STATE | State | Two-letter state abbreviation. | |
| NTEE1 | NTEE major group | NTEE major group (A-Z) | |
| NTEECC | NTEECC primary purpose | NTEECC classification | Beginning |
| zip5 | Zip code, 5 digits | First 5 digits of zip code | |
| outnccs | Out of Scope flag | Out-of-scope (IN/OUT) (see OUTREAS doc. for details) | Beginning |
| OUTREAS | Reason why out of scope | Reason why out of scope | |
| SUBSECCD | Subsection code | IRS subsection code (03=501(c)(3), etc.) | |
| ntmaj5 | Major subsector | Major subsector (5) | |
| ntmaj10 | NTEE major group (10) | 10 NTEE major groups | |
| ntmaj12 | NTEE major group (12) | 12 NTEE major groups: ntmaj10 plus higher education (BH) and hospitals (EH) | |
| NTEEconf | NTEE confidence rating | NTEE classification confidence rating (A/B/C) | |
| MAJGRPB | Major NTEE group | Major NTEE group plus hospitals and higher education | |
| CROW | Row Identification Number | Row Identification Number | |
| C010 | Average Hours Per Week | Average Hours Per Week | |
| C020 | Compensation | Compensation | |
| C030 | Contrib.to Empl Ben. Plns/Def. | Contrib.to Empl Benefit Plns/Def.Comp | |
| C040 | Exp. Account/Other Allowances | Expense Account/Other Allowances | |
| LEVEL1 | Public charity or priv. fndn? | Public charity or private foundation? | Beginning |
| LEVEL2 | Reporting public charity group | Reporting public charity groups. | Beginning |
| level3 | Major NTEE category | Major NTEE category | Beginning |
| level4 | NTEE-CC Major Group | NTEE-CC Major Group | Beginning |
| SCPL | S.C./Cycle/Page/L.C. | Service Center Cycle Page Line (unique identifier assigned by the IRS - used to match primary SOI record with related sub-table records) | |
| COMP_CNT | Compensation table count | Number of Compensated Officers, Directors, Trustees and Key Employees reported (total number of rows in 990EZ Part IV compensation table) | |
| randnum | Random number between 0 and 1 | Random number between 0 and 1 used for creating samples | |