MathU™ 12D v1.3.1

General Features

• Natural calculator interface that matches the layout of the HP-12C
• IEEE Double precision accuracy (about 16 digits)
• 4 element stack
• 38 key keyboard (3 functions per key)
• 16 digit display with SCI, FIX, and ENG formats. Exponents from -308 to 308.
• Status indicators for shift state, compounding mode, and financial annuity mode.
• Preferences to set the number of digits, display format, date format
• One or two line stack display
• Up to 99 program steps
• Multitasking and high resolution support for iOS 4

Memory

• 4 element stack
• 20 global registers (directly accessible via the keyboard)
• 5 dedicated financial registers
• stack and register functions: clear reg, clear fin, clx, x<>y, LST X,

Scientific Functions

• LN, e^x, y^x, √x, 1/x
• INTG, FRAC, RND

Financial Functions

• n (number of periods)
• i (percent interest per period)
• PMT (payment per period)
• PV (present value)
• FV (future value)
• IRR (internal rate of return)
• NPV (net present value)
• 12×, 12÷ (annualized period and interest entry)
• Cf₀, Cf_j, N_j (Cashflow entry)
• AMORT (amortization table)
• DATE (date in the future and day of week)
• ΔDYS (days between dates)
• clear fin (clear financial registers)
• Annuity preference (toggle between payments due at the beginning of the period and payments due at the end of the period)
• Set date format (M.DY or D.MY)
• PRICE (bond price) and YTM (bond yield)
• SL, SOYD, DB (depreciation)

Statistics Functions

• Σ+ (accumulate statistics)
• Σ- (remove data from statistics)
• mean, std
• x,r,  y,r (linear regression)
• %, % change, N! (factorial and Gamma function)
• clear Σ (clear statistics registers)
• x,r and y,r (linear regression estimates)
• x,w (weighted mean)
• n! (factorial and gamma function)

Programming Functions

• P/R (toggle program editor)
• R/S (run/stop program)
• SST and BST (single and back step)
• GTO (go to line in program)
• PSE (pause within program)
• MEM (memory use)
• x≤y and x=0 (conditional branch steps)