Explanation

An indent is a formal request.

It is usually for the supply of goods, services, or materials.

It is commonly used in administrative and procurement contexts.

Explanation

Indexing files involves organizing them systematically, often by keywords, to make retrieval faster.

It helps in efficient file management, ensuring files are easy to find when needed.

Explanation

"Fooling number" (likely a misheard or informal term for Filing or Folio number) is used to track or identify office files.

It helps in maintaining proper record and retrieval of documents.

Explanation

Ex-Officio means a person holds a position automatically due to another role they already have.

Example: A minister may be the Ex-Officio head of a committee because of their office.

Explanation

A D.O. file stands for Demi Official file, used for correspondence between senior officers.

It carries a personal touch but is still semi-formal and official in nature.