Types of random numbers

While reading these slides I came upon the following classification of random numbers:

• "Real" random numbers: use a physical source of randomness
• Pseudo-random numbers: deterministic sequence that passes tests of
  randomness
• Quasi-random numbers: well distributed (low discrepancy) points

I hadn't heard about quasi-random numbers before. Wikipedia links
to low-discrepancy sequence and has diagrams that point out the difference.

"Real" random numbers are often used in cryptographic applications, and
pseudo-random numbers are used all over the place in simulations and
games.

random.org has a good overview for the other two types:

Characteristic	Pseudo-random	Real-random
Efficiency	Excellent	Poor
Determinism	Deterministic	Non-deterministic
Periodicity	Periodic	Aperiodic