Indium is a chemical element with the
chemical symbol In and an atomic number of 49. The
atomic weight of Indium is 114.818. 
Things you might not know about
Indium:
- When it is bent, indium emits a high-pitched
"cry".
- Demand has risen rapidly in recent years with
the popularity of LCD computer monitors and television sets, which
now account for 50% of indium consumption.
- Indium is also used as a thermal interface
material by personal computer enthusiasts in the form of pre-shaped
foil sheets fitted between the heat-transfer surface of a
microprocessor and its heat sink.
See GC2XAY2 - Hydrogen, for an explanation
about this series of caches.