Title text:
It’s hard to decide which simple machine system to invest in. DeWalt makes a great lever and inclined plane, but I hear Milwaukee’s wheel-and-axles are really good.
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3239/
I seem to remember wedge was basically an inclined plane, and a screw was an inclined plane wrapped around an axle. Also a pulley is a specific application of wheel and axle.