This HP graphing calculator is  College Board-approved $133.54. Full-colour with a  multi-touch  touchscreen or keypad interaction, this graphics calculator has powerful math applications, formative HP … Affiliate Program DidYouKnowText(); HP Prime Graphing Calculator with 3.5" colour display touchscreen and CAS (Computer Algebra System). (Not available with any other Promotional offer or Discount code. The HP Prime is an excellent scientific graphing calculator, featuring a rewritten operating system based on Pascal and Algol. The powerful CAS system computes complex calculations on a spreadsheet, while the integrated tool suite with a graphing … This is pure excitement in a graphing calculator!