Brother HL-3260N - Manual (Page 119)

CHAPTER 3 CONTROL PANEL
3-35
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HP-GL Mode
The HP-GL mode is the emulation mode where this printer emulates the
Hewlett-Packard plotter model HP-7475A. Many graphics and CAD
applications support this type of plotter. Use this mode for optimum
performance when printing from these types of applications
"
EPSON FX-850 and IBM Proprinter XL Mode
The EPSON FX-850 and IBM Proprinter XL modes are the emulation modes
that this printer emulates to meet the industry-standard for dot matrix
printers of their respective manufacturers. Some applications support these
dot matrix printer emulations. Use these emulation modes for optimum
performance when printing from those types of applications.