21. Solderless breadboards are available from several different manufacturers, but most share a similar layout. 22. Evolutionary prototyping ( also known as breadboard prototyping ) is quite different from throwaway prototyping. 23. For this reason, solderless breadboards are also extremely popular with students and in technological education. 24. A breadboard or other prototype version of the design for testing against specification may be built. 25. Experimental laser systems benefit from the use of multiple laser beam profilers to characterize the breadboard . 26. The breadboard ends, being cross-grain to the top, will not move with it. 27. Solder-less breadboards and the decreasing cost of professionally made PCBs have nearly eliminated this technology. 28. Often breadboard strips or blocks of one brand can be clipped together to make a larger breadboard. 29. Often breadboard strips or blocks of one brand can be clipped together to make a larger breadboard . 30. The layout of a typical solderless breadboard is made up from two types of areas, called strips.