ChiWriter

ChiWriter was a commercial, scientific text editor for MS -DOS, 1986 programmed by Cay Horstmann. He was one of the first WYSIWYG editors, which was suitable for mathematical formulas, even on IBM PC XT computers that were then common.

The editor was more focused on speed and interactive editing, as a good representation of the results. He had his own graphical interface with bitmap fonts fixed width. Although he was popular (it was easier than many scientists TeX ), this led to his downfall, as increasingly emerged editors vector fonts under MS Windows; 1996 its development has been discontinued.

The basic idea of ChiWriter was that superscript at any normal line for each additional line and subscript was possible, which could also contain text. The extra lines were treated as part of the normal line. This could be used for superscript and subscript characters, and also for more complex formulas or even fractures. Combined with the ability to use multiple fonts at the same time ( up to 20), such as the Greek alphabet, Cyrillic alphabets and mathematical or other symbols, it was pretty easy in ChiWriter to create mathematical texts. Each font had the same fixed size, but it could be different rates are used for different output devices (eg low dissolved for screen display, with high resolution for print output ). Sometimes were large icons (such as integral characters) are composed of characters, the symbol represented parts.

The editor was very customizable. There was also a font editor, which allowed the altering of fonts and creating your own fonts ( including proportional fonts ), and symbols.