Computers take numerous physical
forms.
Early electronic computers were the size of a large room, while entire modern embedded computers may be smaller than a deck of playing cards
Early electronic computers were the size of a large room, while entire modern embedded computers may be smaller than a deck of playing cards
Embedded computers are
usually relatively simple and physically small computers used to control
another device. They may control machines from fighter aircraft to industrial
robots to digital cameras.
These somewhat ungainly but effective methods were eventually replaced by magnetic memory devices, such as magnetic core memory, where electrical currents were used to introduce a permanent (but weak) magnetic field in some ferrous material, which could then be read to retrieve the data.
These somewhat ungainly but effective methods were eventually replaced by magnetic memory devices, such as magnetic core memory, where electrical currents were used to introduce a permanent (but weak) magnetic field in some ferrous material, which could then be read to retrieve the data.
These somewhat ungainly
but effective methods were eventually replaced by magnetic memory devices, such
as magnetic core memory, where electrical currents were used to introduce a
permanent (but weak) magnetic field in some ferrous material, which could then
be read to retrieve the data. Instead, earliest computers stored data in
Williams tubes - essentially, projecting some dots on a TV screen and reading
them again, or mercury delay lines where the data was stored as sound pulses
travelling slowly (compared to the machine itself) along long tubes filled with
mercury. Computers take numerous physical forms. Early electronic computers
were the size of a large room, while entire modern embedded computers may be
smaller than a deck of playing cards
These somewhat ungainly but effective methods were eventually replaced
by magnetic memory devices, such as magnetic core memory, where electrical
currents were used to introduce a permanent (but weak) magnetic field in some
ferrous material, which could then be read to retrieve the data. Instead,
earliest computers stored data in Williams tubes - essentially, projecting some
dots on a TV screen and reading them again, or mercury delay lines where the
data was stored as sound pulses travelling slowly (compared to the machine
itself) along long tubes filled with mercury. Computers take numerous physical
forms. Early electronic computers were the size of a large room, while entire
modern embedded computers may be smaller than a deck of playing
cards