Ideal for engineers, surveyors, college students, scientists and medical professionals.

Accuracy, functionality, dependability. Scientific projects require these vital attributes for success. The pocket-sized HP 33s scientific programmable calculator delivers them - and more - with features that include 31KB user memory, your choice of RPN and algebraic data-entry modes, a powerful two-line display, and the timesaving HP Solve application. Permitted for use on SAT I, SAT II Math IC/IIC, ACT, PSAT/NMSQT, AP Chemistry/Physics, PLAN, EXPLORE†.

Key features

• 31KB RAM user memory
• Pocket-sized - take it anywhere
• algebraic and RPN data entry. Reverse Polish Notation (RPN) efficiently expresses calculation sequences without parentheses -- reducing the number of keystrokes.
• HP Solve application - write and solve equations for any variable without rewriting the original equation
• Edit, undo and delete capability
• Comfortable rubber side grips

Programming features

• keystroke programming
• FLAGS: 0-11; SF, CF, FS?
• X?Y, X?,<, >, =, ?, ?, ?
• SHOW: press and hold [SHOW] to display CK=value length
• MEM: press [MEM] for the Catalog of program labels
• XEQ, R/S: execute a labeled program
• GTO, LBL, SOLVE, INPUT, VIEW, ISG, DSE, FN=, RTN, PSE key
• Solving and integrating programs
• 27-independent memory/storage and recall math statistics programs: curve fitting, straight line, exponential, logarithmic and power

statistical functions

• one/two variable statistics
• linear regression
• ?+: enter data point
• ?-: remove data point
• SUM: n, ?x, ?y, ?x2, ?y2, ?xy
• S, ? :, Sx, Sy, ?x, ?y
• x, y:x, y, xw
• L.R.: r, m, b, x', y'

base-n function

• binary, octal, decimal, and hexadecimal number calculation and conversion
• complement calculation

mathematical functions

• trigonometric, inverse-trigonometric, hyperbolic
• polar-rectangular coordinate conversion
• power, square root, square, cube root, cube, reciprocal
• logarithmic and exponential
• factorial
• RND

fraction mode

• /c function
• FDISP function: fraction, decimal conversion
• most precise fraction
• factors of denominator
• fixed denominator

other features

• 40-physics constants
• scientific engineering notation
• unit conversions: ?cm, ?in, ?l, ?gal, ?kg, ?lb, ?°F , ?°C
• time conversions: ?HR, ?HMS
• engineering notation conversions: ?ENG, ?ENG
• % CHG key
• internal Napier precision