l will like to know how Analogue and Digital fuel pumps work. The
differences ad similarities between them  and the applicaton of a
seven segmet display in the digital fuel pump.l will be glad if l
could get a quick respondce because l'm submitting it fr a term paper
fr my project.

Well the basic differences between digital and analog are "basically"
that the Analog signals are pulses from a mag pick up that read
position, and cause the pump to actuate every 360 degrees. Digital
uses a similar method except that it uses voltage and sends a lose of
voltage signal to a electronic control module which transfers it
digitally to the pump.  Well anyway thats basically it with out
knowing exactly what the pumps are on.  The 7 segment display is just
Liquid Crystal Displays of digital input only.