IQ = Intelligence Quotient
A measurement of a persons logical ability and ability to identify and understand logical patterns. Although much-debated these abilities correlate to a lot of common things, such as proficiency for higher education (an average PhD
has an IQ of 125).
The scale was originally based on mental age divided by actual age but is nowadays based on a logarithmic curve which orders IQ by percent (about 2/3rds of the population lies between 85 and 115 and about one in 1000 has 150+). The average is 100.
The importance of IQ should however not be overstated since social skills, personality, work morale and other factors are at least as important in a working environment.
IQ is a good measurement for how much you enjoy brain-fapping.