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KF5JRV > TECH 20.12.16 14:28l 10 Lines 977 Bytes #999 (0) @ WW
BID : 7277_KF5JRV
Read: GUEST
Subj: Slide Rules
Path: IW8PGT<CX2SA<N0KFQ<KF5JRV
Sent: 161220/1216Z 7277@KF5JRV.#NWAR.AR.USA.NA BPQK6.0.13
Slide rules became obsolete very rapidly in the early 1970s with the introduction of hand-held electronic calculators. Invented in the seventeenth century, an increasing variety of slide rules was developed during the eighteenth and nineteenth centuries. Many of these had special purposes. By the late nineteenth century, standardised forms of slide rule became the essential working tool of engineers and scientists.
Other calculating devices began to become available - mechanical, and electro-mechanical calculators - and by the 1940s electronic computers were beginning to be built. In the 1970s the electronics revolution made pocket calculators with diverse scientific functions available for very modest prices. The age of the slide rule came rapidly to an end.
With the rise of the ubiquitous desk-top computer there has been an increasing interest in antique calculating devices. Old slide rules are now collector’s items.
73 Scott KF5JRV
KF5JRV.#NWAR.AR.USA.NA
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