| |
KD5NJR > TECH 28.08.16 04:09l 26 Lines 881 Bytes #999 (0) @ WW
BID : Q7538CWO6Q5A
Read: GUEST
Subj: Curta
Path: IW8PGT<IZ3LSV<IR1UAW<F1OYP<ON0AR<VK6HGR<ZL2BAU<N0KFQ<AE5ME
Sent: 160828/0205Z 43490@AE5ME.#NEOK.OK.USA.NOAM BPQ1.4.65
https://www.youtube.com/watch?v=P0cGjC62XRQ
https://www.youtube.com/watch?v=ZDn_DDsBWws
----- Message from kf5jrv@kb0wsa.mo.usa.na sent 2016/08/19 11:15 -----
Message ID: 509_KF5JRV
Date: 2016/08/19 11:15
From: kf5jrv@kb0wsa.mo.usa.na
To: tech@ww
Source: AE5ME
Subject: Pocket calculating devices
R:160819/1115Z 43074@AE5ME.#NEOK.OK.USA.NOAM BPQ1.4.65
R:160819/1115Z 509@KF5JRV.#NWAR.AR.USA.NA BPQK1.4.65
Pocket calculating devices
In the early twentieth century, mechanical calculators became common devices
used in commerce and industry. But they remained large and costly machines,
difficult to transport and unsuitable for domestic use. The next step for the
design of calculators was miniaturisation, achieved through precision
engineering and creative recycling of older ideas. With this reduction in size
came a wealth of new designs aimed at broader markets.
Read previous mail | Read next mail
| |
