In fisrt (2?) novels of The Baroque Cycle there is a section explaining this system and character who uses it as a trader. Wall street floor traders use(d) thei

In fisrt (2?) novels of The Baroque Cycle there is a section explaining this system and character who uses it as a trader. Wall street floor traders use(d) their own system for quickly flashing round numbers in ranges higher than ten http://1.bp.blogspot.com/-xRJQ7X06g_I/TgyPveGUbqI/AAAAAAAAAl4/3eCRqdqvqC4/s1600/cboe2.PNG http://1.bp.blogspot.com/-xRJQ7X06g_I/TgyPveGUbqI/AAAAAAAAAl...