They used analog clocks. You still see them in many classrooms.
ages ago
In Greek and Roman times, water clocks were used.
A lot of watches have a perpetual calendar, it even knows that leap years have 29 days in February. Source: http://en.wikipedia.org/wiki/Perpetual_calendar
visual analogue scale was created by French rheumatologists. It was designed to measure any impact that is caused by rheumatoid arthritis affecting the hand.
Analog watches have dials, whereas digital watches have a numerical readout.
The advantages of an analog watch over a digital watch are that analog watches can be more durable in some facets, than a digital one. Many watch enthusiasts also feel that analog watches are more aesthetically pleasing than digital watches.
Analog.
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The only different is one has a needle, the other digital numbers-same as with analog and digital watches.
Analog is a clock with the moving hands on it, while digital is computer generated numbers.
Me
1943
In 1918, a Swiss watchmaker named sand slave
Analog devices are everywhere. Clocks and watches were all analog until the coming of the digital age. Some early computers were analog, worked by manipulating voltages rather than binary digits. Broadly, devices are either analog or digital.
They used analog clocks. You still see them in many classrooms.
Digital Watches