what are the four types of musical instruments?

What are the four types of musical instruments?

These are the four types of musical instruments, as far as I can tell.

First comes guitar.  That is the first and primary category of musical instruments, of course, and the only one that a reasonable person should consider. 

Following that there are things that are not guitars but sort of guitar-ish. Ukuleles and basses, banjos, dulcimers, lutes, etc., all fall in this category.  

Third would be instruments that have strings but are otherwise, not at all guitar-like.  You could lump pianos, kalimbas, harps and all that sort of non-guitar foolishness in that category. 

Lastly comes instruments that are not remotely like guitars at all. They have no strings and they rely on, if you can believe it, having air blown into them, being plugged into an electrical outlet or being pounded on with wooden sticks to produce “music”. Blech. As a category, well, that last set of “instruments”  is hardly worth a reasonable person’s attention at all. ‘course, I maybe a bit biased.  

How do we eat an elephant? One bite at a time.