Log-log plot

In finance, time value is:

• Time value of money; or
• Time value of an option.

In transport economics, time value refers to:

• Value of time

In photography and cameras TVs, time value refers to:

• $T_v$ in the APEX system (Additive System of Photographic Exposure)
• Time value mode (Tv mode), a shutter priority mode on electronically controlled cameras