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.
Heat is the thermal energy that is transferred between two systems when at different temperatures. An isolated object may have thermal energy, but there is no heat in the formal sense of the word. When you rub your hands together, you do not generate heat because there is no temperature difference between your hands.