Organisation. The so-called "Blue Book" was divided into five parts, each devoted to one of the following subjects:
# a general outline of ESRO
# ESRO's scientific programme
# its technology centre
# data handling
# ranges and vehicles

The Blue Book foresaw the firing of some 435 sounding rockets and the successful development and launching of 17 satellites in the 8 years covered by the ESRO Convention, namely 11 small satellites, 4 space probes, and 2 large satellites. It was assumed that 2 launchings would be