Manufacturers typically spend $10,000 to $500,000 and more in developing CD-ROM product catalogs. Ultimately, the success of the
CD depends on whether it allows people to do their work better.
It seems that every manufacturer's representative who visits an engineering office these days has a new or updated catalog on compact
disc for the engineers to try.
Electrical heat tracing has become the standard for many applications since the invention of the self-regulating (SR) parallel
circuit heat tracer in the early 1970s.
Although fewer than two percent of all new homes have them, single-family residential fire sprinkler systems may soon follow the same
path smoke detectors did during the 1980s.