Chapter 3
Existing Data Reduction Software and Pipe-lines

Abstract
At the start of this project, a literature survey revealed very little in the way of previous work on PLs. Pockets of data reduction software existed (e.g., see Bertin and Arnouts, 1996; Mink, 1998; Pence, 1992) as singular entities, however little in the way of a fully autonomous PL existed. Since that time the area of automated data reduction has been seen as not only complementary to astrophysics, but also necessary (see Chapter 2), and the field has rapidly expanded to define its own field of astrophysical science. Outlined here are (i) some of the more relevant, individual reduction tools, which have become available and (ii) some of the more advanced PLs now in operation.
Nowadays it is not unusual for the knowledge about an instrument acquired by the design and construction team to be only partially transmitted to those developing the data reduction software.
de Cuyper and Hensberge (1998)