Oven gas stove included the AGA cooker invented in 1922 by Gustaf Dalén. The first electric ovens were invented in the very late 19th century, however, like many electrical inventions destined for commercial use, mass ownership of electrical ovens could not be a reality until better and more efficient use of electricity was available. More recently, ovens have become slightly more high-tech in terms of cooking strategy. The microwave as a cooking tool was discovered by Percy Spencer in 1946, and with the help from engineers, the microwave oven was patented. The microwave oven uses microwave radiation to excite the molecules
Gadget Amiga computers ("intuition.library" and also later "gadtools.library"). It denotes what other technological traditions call "GUI widget"—a control element in graphical user interface. This naming convention remains in continuing use (as of 2008) since then. The X11 windows system 'Intrinsics' also defines gadgets and their relationship to widgets (buttons, labels etc.). The gadget was a windowless widget which was supposed to improve the performance of the application by reducing the memory load on the X server. A gadget would use the Window id of its parent widget and had no children of its own It is not known whether other software