Portable Document Format (PDF) is a file format used to present and exchange documents reliably, independent of software, hardware, or operating system. Invented by Adobe, PDF is now an open standard maintained by the International Organization for Standardization (ISO).
ACCELA HEAT is a trademark and brand of Sears Brands, LLC. Filed to USPTO On Wednesday, October 01, 2014, The ACCELA HEAT covers Heat-regulating software, sold as an integral component of ovens for the purpose of baking food without the need to preheat the oven. Search for other trademarks at Trademarkia.
  From Wikipedia... A heat wave is a prolonged period of excessively hot weather, which may be accompanied by high humidity. There is no universal definition of a heat w â¦ ave;[1] the term is relative to the usual weather in the area.