Mac OS X - Updates Question

[FSMBP]

I was just wondering, when I first got my Macbook, it had 10.5.0 on it. Then I had to download 10.5.1 when it came out (and so on to the present).

However, after I reinstalled Mac OS X yesterday, I just had to install 10.5.6 (the present release).

Why is it that I didn't have to download 10.5.1-10.5.5 to get all those features each one offered?

Just curious. Thanks for reading.

 

[r.j.s]

Because it was a combo update, which incorporates all the previous updates.

 

[GGJstudios]

10.5.6 includes all previous updates.

 

[jodelli]

Combo updates are usually offered, which incorporate previous beneficial changes.

 

[FSMBP]

Oh ok. Thanks - I just got confused because I'd figure that the size of the latest release would be atleast the sum of all the previous updates.