Fair and 28 F at Pittsburgh - Allegheny County Airport, PA
Winds are Northwest at 6.9 MPH (6 KT). The pressure is 1025.6 mb and the humidity is 72%.The wind chill is 21. Last Updated on Mar 24 2018, 12:53 am EDT. More...
First Passenger Elevator Installed (1857) Elevators—in one form or another—have been used to make human life easier since ancient times. They were once just simple hoists but are now incredibly complex mechanical systems. One of the most significant advances came in 1853 with the invention of a safety device to prevent elevators from plummeting in the event of cable failure. Four years later, the first passenger elevator was installed, paving the way for taller buildings and the urban geography of modern cities. Where was it installed? Discuss More...
'Smilies' are small graphical images that can be used to convey an emotion or feeling.
If you have used email or internet chat, you are likely familiar with the smilie concept.
Certain standard strings are automatically converted into smilies.
Try twisting your head on one side if you do not 'get' smilies;
using a bit of imagination should reveal a face of some description.
If you want to disable smilies in a post that you make, you can select the 'Disable Smilies' option
when posting. This is particularly useful if you are posting program code and you do not
want ;) converted to a smilie face!