Hewlett Packard HP-27S

Serial Number 2913S32098: 1989, 13th week, Singapore
Accessories Pouch

Manual: HP-27S Scientific Calculator, Benutzerhandbuch, March 1988 (German), still sealed

Manual: HP-27S Scientific Calculator, Owner's Manual, Feb 1988, bound printout from the MoHPC CD-ROM
Condition Very good but not mint: There are a few small color defects around the display and a small scratch next to the "<=" key. Also tape stains on the back but those can be cleaned off.
Acquired 13.7.2002
Accessory Benutzerhandbuch (German)
Acquired 14.7.2002
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HP codename, series Mentor, Pioneer
Typ, Precision, Input Mode Scientific & business, 12 BCD digits, exponent 499, Algebraic
Programmable No, but comes with extended support for equations
Memory More than 6900 bytes shared among variables, equations and lists
Display 132x16 LCD dot matrix, 22x2 characters
Special features Printer support, date arithmetic, timer and appointment manager with beeper, hyperbolic trig functions, statistics and probability, root finding, numberic integration, different number bases, ALPHA strings, equations, list manipulation, financial TMV functions, two-line dot-LCD display.
Works with the HP Infrared Printer.
Original Pricing, Production 4.1.1988 ($110) - approx. 1992 ($80)
Batteries 3x small button sized cells
Dimensions Length 14.7cm, Width 7.8cm, Height 1.5cm
Links HP-27 Scientific Calculator Owner's Manual, Feb 1988 (PDF)
Quick Reference (PDF)
HP-27S, HP-19B Technical Applications (PDF, Nov 1988)
For Machine language programming see comment about HP-17B.
Comment What a nightmare! There are many cool features like the versatile equation solver and list manipulation. However, the integration of all these features into menus is a terrible mess. It is never clear what will happen next when a function key is pressed - nothing is intuitive. The lack of RPN does the rest and leaves you puzzled if for example the % key is pressed...
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