The Magnesium Diboride is a superconducting compound discovered in 2001 with a relatively high-critical temperature. The absence of weak-link and the simple crystalline structure allows producing low- cost wires through the powder in tube (PIT) technique, allowing the industrial application. In the past ten years, the MgB2 wire technology has made a significant progress, thanks to the continuing development and improvement supported mostly at industrial level. MgB2 is now a good candidate to replace NbTi in cryogenic-free MRI magnets, but also in rotating electrical machines, wave-energy converters and in high current cables for powering devices or in transmission and distribution electrical power lines. The effort made by Columbus MgB2 wire unit (ASG Superconductors Spa) develop a technology which allows to produces MgB2 multi- filamentary wires with unit length exceeding 2-4 Km in a single piece.