1. Dot Matrix Printers
1

2. How it works:
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Punches ink onto the
paper, like a typewriter.
Uses patterns of dots to
make letters.
2

3. How it works:
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Letters are made up of
patterns.
Usually 7 dots vertically, but
variations have been
observed.
3

4. How it works:
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Each character has a map of
dots that are printed.
For example:
–
H has 7 dots in the first
column, two dots in position 4
for the next two, then 7 dots
for the final part.
4

5. Found in:
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Anywhere where price is key.
Anywhere where quality
doesn't matter.
Payslips, reciepts, paperwork
.
5

6. Pros and Cons
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The cheapest per page
method for printing.
Simple to build and maintain.
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Very low resolution.
Doesn't cope that well with
colour.
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6