if you are asking for hard copy output devices, then two examples would be
printers
plotters
if you are asking for types hard copy documents then two examples would be
letter
card
Make you depressed? (wild guess) (new to this)
Answer:
The answer is Coarse wavelength division multiplexing (CWDM)
Explanation:
CWDM is the wavelength designed for short- distance connections and has only a few lambdas. It is mostly used nowadays as a type of wavelength technologies deployed in cities and inner access ways. It is inexpensive and thus a cost effective wavelength division multiplexing. Cost effective lasers can be used in CWDM due to the spacing of about 20nm between its wavelengths.
