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leading edge

(1) The edge of a document (or of a punch card during many decades of data processing) that enters the read station first.

(2) In digital electronics, a pulse as it changes from a 0 to a 1.

(3) In programming, a loop that tests a condition before the loop is entered.

(4) The latest technology. See bleeding edge.

(5) (Leading Edge Products, Inc., Westborough, MA) A PC manufacturer founded in 1980. Its Model M (for Mitsubishi) in 1982 was the first PC from overseas. Korean Daewoo Corporation supplied it with products since 1984 and acquired it in 1989. Leading Edge computers are no longer sold in the U.S.

bleeding edge

A pun on "leading edge." It implies that using the latest technology is often risky because it has not been tested with enough users and may not perform as expected. Introducing an advanced product or service is also risky because the user community may not be ready for it or really want it. See leading edge and pushing the envelope.

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