Added information on how to use "Delegation" to show all google calendars.

The Full Charge Capacity decreases with the lifetime and number of cycles of the battery. So now and then you will see a slight decrease. If you want to follow and write down the development over time, you can use a tool like Coconut Battery.

I would not say that because it happens on two different iMacs (private and at office). Opening the address book most probably is not solely a local activity if you use iCloud and/or an Exchange Server in the background. I also don't say that it takes several seconds, but it is a noticeable delay which I would to avoid – the address book must be available immediately.

Why do you think that Jing is discontinued? I cannot find any evidence for this on the Jing homepage (techsmith.com/jing.html).

But even a small app like the address book takes a noticeable amount of time to start (even on my 27" iMac with 12 GB RAM) where I expect immediate availability after the first start.

Yes, that's what I do (if I remember). I find it strange, though, that Apple deviates from the standard behavior.

Usually an app und OS X does not quit when you close the window. Rather it remains active. I do not understand why Apple is starting to change this standard behaviour with some apps, e.g. the address book.