routerOS default vs extra packages

Hello,
I’m confused about the difference between “standard” packages and extra packages.
For example, the “advanced-tools” package (which is listed in extra packages) is updated when I install the routerOS npk. So I presume that routerOS package contains also some additional, but I failed to find a document which states what routerOS contains.
Am I missing something?
TIA

the bundle package contains the most commonly used packages: “system, hotspot, wireless, ppp, security, mpls, advanced-tools, dhcp, routerboard, ipv6, routing”

but the “Extra packages” ZIP file contains ALL the packages.

source: http://wiki.mikrotik.com/wiki/Manual:System/Packages#RouterOS_packages

Thanks for prompt reply.
Are you aware of some official web page which list how the bundle is composed?
I wasn’t unable to find such information in the link you provided.
Thanks again

It is in the link. In the table, bottom, look for “routeros-mipsbe (mipsbe)” (that is the name of the bundle file)

Doh! I need an extra pair of glasses…

Thanks for prompting me in the right direction