Dinner is on me

请人吃饭英文怎么说？ Dinner is on me!
Why? Just kidding, don't take it seriously.

Level of Availability

We may see these terms many times, HA (High Availability), 5 nines requirement, MTBF, but what's the relationship among them? This table gives us a clear picture for them, assuming 4 hours are required to restore the failure system. More details calculation could be found at ccpu website.

Goto the last edited page in Word

For long time, I desired to make Microsoft Word open to the last viewed page, but don't find this setting/configuration in word. First thing I do at Acrobat Reader after installation is set this preference.

Today, I find this magic key finally in Word: Shift+F5, although it's not exactly what I'm looking for at the beginning. But It's very close! The combination of keys will bring you to the last EDITED page.