One of the reasons that I use Credo daily is because it gives me short bursts of information.
Use Credo Reference to find info from:
As of today, it's stats are: Searching 3,410,565 full text entries in 587 reference books.
Needing some measurements, then this is the place to stop. It covers area, distance, energy, fuelconsumption, power, speed, temperature, volume, and weight.
Not only does it search "words", but it searches "images" and can create a concept map.