III

III (iii) may refer to:

• Information International, Inc., a computer technology company
• Innovative Interfaces, Inc., a library-software company
• 3i Group plc, formerly Investors in Industry, a British investment company

Year 3 (III) was a common year starting on Monday or Tuesday (link will display the full calendar) of the Julian calendar (the sources differ, see leap year error for further information) and a common year starting on Monday of the Proleptic Julian calendar. At the time it was known as the Year of the Consulship of Lamia and Servilius (or, less frequently, year 756 Ab urbe condita). The denomination 3 for this year has been used since the early medieval period when the Anno Domini calendar era became the prevalent method in Europe for naming years.

In music, the mediant (Latin: to be in the middle) is the third scale degree of a diatonic scale, being the note halfway between the tonic and the dominant. It is sung as mi in solfege. Similarly, the submediant is halfway between the tonic and subdominant. The fifth note is almost always a perfect fifth, while the third note can equally be a minor or major third.