Task, Action, TaskFactory, Parallel, and TaskScheduler classes.

massive update on indexes is more expensive than rebuilding them

The following hardware is recommended for maximum enjoyment:

The Raspberry Pi computer (Model A or B)
SD card (4 GB minimum)
Powered USB hub (projects verified with Belkin F5U234V1)
PC/laptop running Windows, Linux, or Mac OS X with an internal or external SD card reader
USB microphone
USB webcam (projects verified with Logitech C110)
USB Wi-Fi adapter (projects verified with TP-Link TL-WN822N)
USB GPS receiver (projects verified with Columbus V-800)
Lithium polymer battery pack (projects verified with DigiPower JS-Flip)
Android smartphone (projects verified with HTC Desire)