Some inventions operate in a recursive or iterative manner. This could be so of a machine that repeats actions or functions on a single article or to produce multiple articles, or operates on data.

An iterative algorithm for solving linear least squares problems has been developed and tested on an IBM 1620 computer. This article traces the development of the algorithm from that described by ...

Throughout the many different types of system architecture in the past six decades, one thing has always remained true: Hardware always gets ahead of software, and rather than be too annoyed about it, ...