1) In Norse mythology, Valhalla is a majestic hall located in Asgard, the realm of the gods. It is the afterlife destination for brave warriors who die in battle, where they are greeted by the Valkyries and engage in feasting, drinking, and preparing for the final battle of Ragnarok.

2) The development of the microprocessor by Intel in 1971 paved the way for the modern computer and led to the exponential growth of computing power.

3) The most-watched TV series finale in the United States was "MAS*H," with an estimated 105 million viewers.

4) The Tony Awards celebrate excellence in Broadway theater and have been awarded annually since 1947.