UNIX Shell is the Best Fourth Generation Programming Language
It is the UNIX shell that makes it possible to do applications in a small
fraction of the code and time it takes in third generation languages. In
the shell you process whole files at a time, instead of only a line at a
time. And, a line of code in the UNIX shell is one or more programs,
which do more than pages of instructions in a 3GL. Applications can be
developed in hours and days, rather than months and years with traditional
systems. Most of the other 4GLs available today look more like COBOL or
RPG, the most tedious of the third generation languages.
"UNIX Relational Database Management: Application Development in the UNIX
Environment" by Rod Manis, Evan Schaffer, and Robert Jorgensen. Prentice
Hall Software Series. Brian Kerrighan, Advisor. 1988.