If you are looking at a specific document referencing "ANNINC," this is likely an abbreviation for Annuity Income or a specific internal table name for Annuities . Annuity contracts frequently utilize WID codes to switch payment streams from the primary holder to the surviving spouse.
When a policyholder passes away, benefits are often paid out to a surviving spouse. The code WID is attached to the beneficiary’s record to denote their status as the widow or widower of the insured. This helps determine payout options (e.g., "Joint and Survivor" options often transition to "Widow" status upon the primary annuitant's death). wid codes dictionary anninc