Post-latency: this refers to the fourth stage of Sigmund Freud's model of psychosexual development, succeeding the oral, anal and phallic stages, and preceding the genital stage. Freud described this stage as being one of stability, serving as a transition between stages, where sexual feelings lay dormant during childhood.
This, along with the other factors listed, is cited as a reason for the use of recreational drugs in U.S. Secondary schools.
ARPA-NET (Advanced Research Projects Agency Network) was the world's first packet-switching network, the forerunner of the contemporary Internet. It was created by the Defense Advanced Research Projects Agency (DARPA) of the United States Department of Defense.