riddle - Name that entity (2)

I answer all who can connect
I amend mistakes without respect

I aim to place, I aim to serve

I give you knowledge with little reserve

In me, the primary colours I do hold
Though two had a child who won't grow old

Answer

Are you:

Google

?

I answer all who can connect

Connect to the Internet

I amend mistakes without respect

Suggestions!

I aim to place, I aim to serve

A free service

I give you knowledge with little reserve

An essential source of knowledge these days.

In me, the primary colours I do hold

The logo is Blue, Red, Yellow (and Green) - NB: This refers to Subtractive Primary Colours (unlike those usually used in computer devices (Additive Colours))

Though two had a child who wont grow old

Green is a child of Blue and Yellow