2. Microsoft Project)； software;

3. P3 and P6 of Primavera Systems, USA;

P3 was first developed and operated under the DOS system of PC, and then went through various platforms of Microsoft Windows. The version of P3 was upgraded from 1.0(ps: I have never seen it) to 3. 1. Around 2000, P3 3. 1 became the final version of P3 series, and Chunhua transplanted P3 to a new epoch-making product-Chunhua Enterprise. With the development and upgrading of new software, the versions range from 2.0 to 3.5, 4. 1 and 5.0, during which many brand names are used: P3E, P3e/c, Team, Primaver e &；; C, wait for the official release of version 6.0 in July 2007 1. Chunhua Company named the brand P6, and we will look forward to the arrival of P7 and P8. ...