| 713 / | HD | ELECTRICAL COMPUTERS AND DIGITAL PROCESSING SYSTEMS: SUPPORT |
| 300 | DF | COMPUTER POWER CONTROL {4} |
| 320 | | .~ Power conservation {4} |
| 321 | DD | .~.~> Programmable calculator with power saving feature |
| 322 | DF | .~.~> By clock speed control (e.g., clock on/off) |
| 323 | DF | .~.~> Active/idle mode processing |
| 324 | DF | .~.~> By shutdown of only part of system |