Only silent hand-held calculators designed for mathematical computations such as logarithmic, trigonometric, and graphing functions are permissible. Computers, calculators with a QWERTY keyboard, and electronic writing pads will not be allowed. Calculators that have built-in notes (definitions or explanations in alpha notation) that cannot be cleared are not permitted. Students are not allowed to bring any external support devices, such as manuals, printed or electronic cards, printers, memory expansion chips, or external keyboards to an examination. In preparation for calculator failure, students may bring extra calculators and batteries into the exam room. Communication between calculators is prohibited and calculators must not have the ability to either transmit or receive electronic signals. Before an exam begins, calculators must be removed from their cases and placed on the students’ desks for an inspection by a mathematics or science teacher. Students must clear all programmable calculators, both graphing and scientific, of all information that is stored in memory. Cases must be placed on the floor and left there for the duration of the exam.