logical operations

252-function pocket scientific calculator Combinations and permutations Enginnering symbols Logical operations 18 levels of Parentheses Converts and calculates different numerical bases (Decimal, Binary, Hexadecimal, Octal) Trigonometric functions 6 constant memories Powered by solar cells with internal battery back-up Convenient and protective case

144-function pocket scientific calculator Combinations and permutations Logical operations 10 levels of Parentheses Time calculations (DMS) Trigonometric functions Powered by solar cells with internal battery back-up Convenient and protective case