This guide is intended to help financial aid administrators (FAAs) interpret student financial aid information that appears in the Student Aid Report (SAR), a paper output document sent to the student, or in an Institutional Student Information Record (ISIR), which is an electronic record sent to the institution. The guide explains the codes and flags that appear as FAA information on the SAR and ISIR. The guide is organized in three sections: (1) an introduction, which covers major system changes, the processing flow and processing system, transactions, and highlights and assumptions; (2) information summaries for SARs and ISIRs, which provide FAA information, including agency source, record type, various kinds of flags, special handling, reject reasons, intermediate compute values, and comment codes; and (3) corrections and updates, which includes various information review and request forms, parent information, school code corrections, and dependency status changes. Appendixes include reject codes and reject reasons; data base matches and flags; financial aid history match flags; 1999-2000 comment codes and text; addresses; sample SARs and SAR information acknowledgment; and sample ISIR. (CH)