attempt was made to vary line thickness.
A digitalization of characters has been prepared recently at the Bell Telephone Laboratories6 for use on vector plotters. Line thickening was achieved through the use of multiple lines one raster unit apart. The style of character has been limited so far to Roman and Greek lower case and upper case. The remarkable success of the line thickening has been a stimulus to an extension of the same technique to exotic graphics.
The digitalizations at the Naval Weapons Laboratory and at the Bell Telephone Laboratories complement each other insofar as they do not overlap from the standpoint of style or height of character.
A digitalization of characters is currently under preparation at the Naval Weapons Laboratory for use on vector plotters. Details of the current digitalizations are presented herewith as Appendix B.
The scope of the digitalizations is indicated by the following table.
CHARACTER DIGITALIZATIONS
| I | SIMPLEX |
| Roman, Greek, Script, Numeric, FORTRAN, Electronic, Cartographic. | |
| II | DUPLEX |
| Roman, Greek, Italic, Futura, Script, Russian, Numeric, Mathematic, Astronomic, Musical. | |
| III | TRIPLEX |
| English Gothic, Italian Gothic, German Gothic. | |
| IV | JAPANESE |
| Hiragana, Katakana, Kanji. |
2
