Fonts can be classified into two categories, bitmapped and scalable:

• Bitmapped: Bitmapped fonts form characters witli patterns of dots. Each particular bitmapped font (e.g .. Times Roman, Courier) specifies a dot pattern to be used
for ach letter. number, and special character. each print style (e.g .. bold. italic). and each type size (e.g .. 10 pts, 12 pts). Bitmapped fonts are stored in a font file that contains the predefined character patterns for each poinl size. If more point sizes are added to a bit-mapped font the font file requires more disk space.

• Scalable: Scalable fonts are defined by a base font (, kind of starting point); which outlines the basic font face and design and contains a mathematical formula to generate the character in a requested point size or print style. Variations' of a font are generated from the base whenever a point size other than the base is needed. True Type and PostScript fonts are examples of scalable fonts.

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When you click on a button to print, there is a sequence of events that takes place as follows:

1. The software application you are using sends the data to be printed to the printer driver.

2. The driver translates the data into a format that the printer can understand arid checks to see that the printer is online and available to print.

3. The data is sent by the driver from the computer to the printer via cable connection.

4. The printer receives the data from the computer. It stores a certain amount of data in a buffer. The buffer can range from 512 KB random access memory (RAMI to 16 MB RAM, depending on the model. Buffers are useful because they allow the computer to finish with the printing process quickly.

5. If the printer has been idle for a period of time. it will normally go through a short clean cycle to make sure that the print head(sl are clean: Once the clean cycle is complete. the printer is ready to begin printing.

6. The control circuitry activates the paper feed stepper motor. This engages the rollers, which feed a sheet of paper from the paper tray/feeder into the printer.

7. Once the paper is fed into the printer and positioned at the start of the page. the print-head moves across the page.

8. The print-head starts forming characters on the paper. The print-head is most important part of a printer as it is the source of ink, which prints characters on the page.

9. Once the entire data in the printer's buffer is printed on the page, the paper feed stepper motor spins the rollers to finish printing and pushes the completed page into the output tray.

10. The printer refreshes its buffer, and ready becoems for next printing job.