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Since the early 1990s, Military specifications for resistors have
gradually implemented acquisition reform. Consequently, the specifications no
longer detail specific materials, processes, or design controls that must be
used in the resistor manufacturing operation. (E.g., most resistor
specifications changed from MIL-Rs to
MIL-PRFs).
Considerable differences exist between the materials
and process controls used for each resistor style. A large wirewound resistor, for example, is
manufactured dramatically different from a chip capacitor. However, some
generalizations can still be made about typical construction materials and
design controls. These are discussed individually under the "construction"
information Resistors Derating section.