Answer: Code of accounts.
Step-by-step explanation:
In project management, a code of accounts is a vital tool in managing any project because it makes it easier to differentiate numerous parts of a project without the need to remember terminologies or lengthy names.
A code of accounts is the unique numbering or lettering whereby letters or numbers are attached to each unique part of the project during the work breakdown structure (WBS) stage. The assigned numbers and letters should not be changed throughout the project's life cycle.