Abstract: Disclosed are fluorobenzene derivatives, which are important intermediates for producing herbicidal oxazolidinedione derivatives, and methods of producing them. The fluorobenzene derivatives include compounds of a formula (11): ##STR1## where X is a halogen atom, R.sup.3 is a nitro, amino or isocyanato group or R.sup.1 OCONH, and R.sup.1 is an alkyl or phenyl group. Via the intermediates of the invention, oxazolidinedione derivatives can be produced with high yield.

Abstract: A ruled line pattern is divided into four line elements, two of them being assigned to represent the vertical rule line and the remaining two elements being assigned to represent the horizontal rule line. Selection keys are provided on a keyboard panel for selecting a desired line element. The ruled line data is of four (4) bit construction and is developed in response to the input operation conducted through the selection keys. The first and the third bits of the ruled line data represent the horizontal rule line, and the second and fourth bits of the ruled line data represent the vertical rule line in each address.

Abstract: A word processing apparatus includes a print control system for printing a horizontal ruled line and a vertical ruled line in addition to characters. The vertical ruled line is printed on a character print line. When the vertical ruled line becomes discontinuous due to a long distance provided between two character print lines, an interpolation line is printed in order to provide a continuous vertical ruled line.