Obsolescence in the context of "Remanufacturing"

A cel, short for celluloid, is a transparent sheet on which objects are drawn or painted for traditional, hand-drawn animation. Actual celluloid (consisting of cellulose nitrate and camphor) was used during the first half of the 20th century. Since it was flammable and dimensionally unstable, celluloid was largely replaced by cellulose acetate (cellulose diacetate and cellulose triacetate) and polyester. With the advent of computer-assisted animation production (also known as digital ink and paint), the use of cels has been all but obsolete in major productions. Walt Disney Animation Studios stopped using cels in 1990, when Computer Animation Production System (CAPS) replaced this element in their animation process. In the next decade and a half, other animation studios phased cels out as well in favor of digital ink and paint.

Meyers Konversations-Lexikon or Meyers Lexikon was a major encyclopedia in the German language that existed in various editions, and by several titles, from 1839 to 1984, when it merged with the Brockhaus Enzyklopädie.

Joseph Meyer (1796–1856), who had founded the publishing house Bibliographisches Institut in 1826, intended to issue a universal encyclopaedia meant for a broad public: people having a general knowledge as well as businessmen, technicians and scholars, considering contemporary works like those of Pierer and Brockhaus to be superficial or obsolete.

The cementation process is an obsolete technology for making steel by carburization of iron. Unlike modern steelmaking, it increased the amount of carbon in the iron. It was apparently developed before the 17th century. Derwentcote Steel Furnace, built in 1720, is the earliest surviving example of a cementation furnace. Another example in the UK is the cementation furnace in Doncaster Street, Sheffield.

Deprecation is the discouragement of use of something human-made, such as a linguistic term, a proper name, a feature, design, functionality, piece of code, or practice. Typically a thing previously used is deprecated because it is—or is claimed or thought to be—inferior compared to other options now available. Deprecation is thus a mechanism for future improvement. Deprecation implies that the community (generally, or a community of experts, or a professional body governing a sector or industry) has determined that future use—of the term, name, device, design, or feature—is unwise; but also that its replacement or removal, from that which is extant, is not required or is non-urgent.

Something may be deprecated even though past or extant applications of it might still be useful or functional in particular contexts—the goal here need not be the complete replacement of that which has been deprecated but rather an improvement on some broad metric (eg, safety) of the stock of that thing over time. Thus: deprecation of archaic terms to obtain consistency and readability in language/terminology; deprecation of obsolete electrical components to improve safety and compatibility in the housing stock; or deprecation of certain shared code to improve an open-source software project.