PWP file format used on Smith Corona Personal Word Processors:

header: first 0x40 bytes:
     00-01:  LSB Length of file (less two byte length)
     02-16:  string "           ML4D '92" 01 00
	17:  character pitch  04=15   05=12   06=10
	18:  line spacing     02=1    03=1.5  04=2
	19:  page length      42=11"  54=14"  46=A4  FC=off
	1A:  top margin (in lines)
	1B:  bottom margin (in lines)
     1C-1D:  LSB left margin (in 1/6 chars)
     1E-1F:  LSB right margin (in 1/6 chars)
     20-3F:  list of tabs: position (in 1/6th char) type:
		00: regular tab    C0: decimal tab
	        80: centered tab   40: right aligned tab

hard carriage return ^J (/x10)
soft carriage return ^[ (/x1B)
bold characters preceeded by a ^A (/x01)
underlined characters preceeded by a ^B (/x02)
Bold and underlined characters preceeded by a ^C (/x03)
centering begins with /x08 ends with /x0D applies only to single line
  and is spaced from left margin with /x1E's
format-change begins with /x06 ends with /x0D and contains two bytes
	0: as 17: above
	1: as 18: above
superscript begins with /x13 and ends with /x14
subscript begins with /x14 and ends with /x13