Bitcoin

Bitcoin-Qt version 0.5.0 was released

Tuesday Nov 1, 2011
Washington D.C., U.S.

On 1 November 2011, the reference implementation Bitcoin-Qt version 0.5.0 was released. It introduced a front end that used the Qt user interface toolkit. The software previously used Berkeley DB for database management. Developers switched to LevelDB in release 0.8 in order to reduce blockchain synchronization time.