It may have taken Microsoft a year to realize it, but the original Windows 8 TileWorld may have been the world’s first major operating system without so much as a four-function calculator.
All is forgiven now; see Figure 4-2.
Figure 4-2. The new TileWorld Calculator app has three modes: Standard
(complete with four functions, memory, and square root); Scientific,
shown here at top; and Converter (bottom). The Converter
offers three pop-up menus, marked by the usual 
buttons. The top one lets you specify a
conversion type: volume, length, weight, temperature, energy, area,
speed, time, power, or data. The two lower ones let you
specify what units you want to convert to or from. Handy,
really.
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