Here are entered works on custom bindings of books, irrespective of contents. Works on books that are produced by artists and intended as visual art objects are entered under Artists' books. Works on books illustrated with original prints by well known artists and published in limited editions are entered under Artists' illustrated books. Works on existing books whose pages have been altered by paint, collage, or other media are entered under Altered books.
--subdivision Supply and demand under occupational groups and types of employees, e.g. Accountants--Supply and demand; Construction industry--Employees--Supply and demand
Here are entered works on forms of public passenger transportation that are demand responsive, usually nonscheduled, and not necessarily operated on a fixed route. Works on public passenger transportation generally consisting of computerized, driverless vehicles, on a fixed guideway are entered under the heading Personal rapid transit.