Printers are considered standard PC components, they are often bundled with computers and sold to consumers as part OS a complete package. The most common add-on printers are manufactured in several popular forms. Like other devices, each type has unique advantages and disadvantages.
When evaluating printers, you should keep the following issues in mind
Printer resolution
Speed
Graphics and printer language support
Paper capacity
Duty cycle
Printer memory
Cost of paper cost of consumables
Optimizing memory manually is an art. And there are things that you need to look out for. For instance, some programs when loaded high, do not successfully load into the space where should fit into. As an example, a program in conventional memory is about 6 KB in size.
You have a 7 KB free block in region 2, but it won’t fit. Why not? Because some programs, when loading, need more memory while initializing than after initializing. Your 6 KB program may actually require 8 KB to initialize, so in effect you are asking DOS to stuff an 8 KB program into a 7 KB block
