The document summarizes digital power supply usage from 2001 to the first quarter of 2003. It shows that a pechf board was the most commonly used fusion board in 2001 with 78 usages that year. In 2002, pechf board usage increased to 105 while farmnt board usage rose to 58. For the first three months of 2003, pechf and farmnt continued to be the most used boards with 44 and 36 usages respectively. The document also summarizes digital power supply part numbers and usage, showing a total of 12 parts used from 2001 to the first quarter of 2003.