Some technologies

PHONOGRAPH
The phonograph was invented on 1870 by Thomas Alva Edison.

Phonograph operates with one mechanical analog recording; sound waves are transformed into mechanical vibrations; this vibrations movie a hand, that reproduce the sound.

TELEVISION
The television was invented on 1900 by Constantine Perski.
Television is a transmission system that emit images and sounds to large distance

CALCULATOR
The calculator was invented on 1642 by Blaise Pascal. He was French mathematical.
The calculator is a device, it serves for do arithmetic and statistic calculates, and other function is make graphics.

WATCH
The Babylonians were the first to measure the time. They measure the hours, months and years. They calculated the day duration, and the translation motion of the earth. For measure the months, they calculate the moon cycle.
The first watch was based in the shadow, why was called, sundial.