A grammar base question-answering procedure
Peter S. Rosenbaum · Communications of the ACM · 1967
Cathode-Ray TubeThe letters we have generated were drawn o~ a specific machine, the Stromberg.-Carlson4020 microfilm printer.A. brief description of the SC 4020 will assist in using the rector letters with other machines.The SCC 4020 has two modes of operation.First, it can draw vectors, which can start at aw raster point on its 1024 X 1024 grid and extend up to 64 grid spaces in either or both x and y directions.Secondly, it can produce a total of 64 different characters by shaping the electron beam with an appropriate nmsk in the cathode-ray tube.One character is a dot.This mode allows one to construct shapes using closely spaced dots, or any other available character, as building blocks.In the type fonts described here, only the vector *~iode ~>i operatior~, was used.Measurement of the widtt~ o:l i.i~, vector indicates that it is equal to 2.3 grid spaces.'fi~ ... means that a character which is 23 grid spaces high t~a:~ :~ resoluti which will be numerically described and computer dra.~-;,~.The generality of the representation is clear from the ease with which the vectors can be adapted to other compu}-e>> and other cathode-ray tubes.We believe the fonts wi!! have great utility.