Decades: 1290s BC 1280s BC 1270s BC 1260s BC 1250s BC - 1240s BC - 1230s BC 1220s BC 1210s BC 1200s BC 1190s BC
Significant People
... by Professor Ross J Anderson on his Web site at www.cl.cam.ac.uk/~rja14/tcpa-faq.html/ for a clear discussion of two prominent proposals. Examples of existin ...