Europe's most precise clock
...busily counting the zillionths of seconds, is here in Finland at the electronics department of the Lappeenranta Polytechnic. It is an atomic clock and its accuracy over a period of five thousand hours up to 4.11.98 was within 5.5 x 10-15 of a second. The team that developed the clock was headed by Professor Pekka Eskelinen, who says: "We cannot claim that it is the most accurate in the world, but no one else so far can point to anything better, either." Extremely accurate clocks are needed in, for example, broad-band data- transmission networks. A dozen or so laboratories world-wide are now trying to establish a record for the world's most accurate timepiece.