A prototype of a vintage Apple Macintosh from 1983 is up for grabs at auction, with the "Twiggy" drive model expected to exceed $100,000 when it goes under the hammer.

The Prototyping Model is a systems development method in which a prototype is built, tested, and then reworked as necessary until an acceptable prototype is finally achieved from which the ...

To manage this, a number of system development life cycle (SDLC) models have been created: waterfall, fountain, spiral, build and fix, rapid prototyping, incremental, and synchronize and stabilize.