Hewlett Packard 7470A
The HP7470A graphics plotter is a low cost, two pen plotter which accommodates two standard media sizes: 8.5 x 11 in and 210 x 297 mm (A4). This new compact plotter has many features that you would expect to find only in expensive models.
It has the same high quality components and innovative paper-moving technology used in HP’s drafting plotters.

Hewlett Packard 7475A
The HP 7475A, six pen graphics ,is a low cost plotter that provides the kind of graphics excellence and versatility you would expect to find in a much more expensive plotter. The HP7475A produces fast, high quality, drawings for business, design, and measurement professionals. You have your choice of two media sizes-A4/Asize for colorful report and presentation graphics, and A3/B size plots for PERT- charts, schematics, engineering drawings, and design applications. You can switch chart sizes with the push of a button.

Hewlett Packard 7550A
The HP7550A is a eight pen graphics plotter. Automatic cut sheet feed capability for paper and transparencies makes the HP7550A ideal for unattended plotting or multiple color copies.. The HP7550A draws in any direction at 80 cm/s (31.5 in /s)and letters at approximately 7-9 characters per second.