Hot Spot has multiple definitions:
Sun's Java Hot Spot virtual machine (Hot Spot Vm). Advertised as "raises the bar on performance via adaptive optimization technologies." http://java.sun.com/products/hotspot java.sun.com
The variable parts of a Frame Work are also called its Hot Spots -- Peter Maier
Short for a Frame Work design method which is called Hot Spot Design --Thomas Weidenfeller
*http://www.wi-fihotspotlist.com/
Hardware engineers try to prevent hot spots...
See original on c2.com 