An Analog Computer’s circuit blocks can include the following key components/functions as plug-in cards for the system backplane, where some those functions can appear in plurality on a card ...

New images show a front-line NATO ally's plan to blunt a Russian invasion at the border You have two coins that equal 30 cents One is not a quarter What two coins do you have Vikings face backlash ...

Of course, it's a good idea to make sure the parts function on a basic level, but even a part that technically works might have issues that won't become apparent without consistent use.