The HP-18C is a Hewlett-Packard business calculator which was quickly followed by the very similar but greatly improved HP-19B. The HP-18C is HP's first RPL-based calculator internally, [1] even though this was not visible on user-level in this non user-programmable model

The HP-18C was a business calculator with a new folding design and a dedicated alphabetic keyboard. It was HP's first algebraic pocket calculator. (HP previously used algebraic logic on desktop calculators, portable and desktop computers, and the HP-01 calculator watch.)

View and Download HP -18C owner's manual online. BUSINESS CONSULTANT. HP-18C pda pdf manual download.

Connect, protect, and deliver seamless experiences. The HP-18C was the first in a series of "clamshell" calculators produced by HP. An advanced business model, the HP-18C calculator had a "clamshell" design, opening like a book with two keyboards facing each other inside.

Free download of a color scan of the English-language book 'HP-18C Owner's Manual' by Hewlett-Packard, which is an owner's manual (user's guide, operating manual, owner handbook) for the HP-18C calculator.

2021年10月23日 · HP-18C 是一款采用全新折叠设计和专用字母键盘的商务计算器。 这是 HP 的第一台代数袖珍计算器。 （HP 以前在台式计算器、便携式和台式计算机以及 HP-01 计算器手表上使用代数逻辑。 ）除了具有货币时间价值、现金流量等基本业务功能外，它还有一个带有预约的时钟，非常 强大的 方程求解器。 它有 4 个编号的 寄存器，以及命名列表。 HP-18C 也是第一款由 HP 用新的 RPL 语言编程的计算器，因此它被列在 RPL 系列中； 但是，计算器的用户无法使用 …

HP 18C calculator is a two keypad calculator that faces each other. The dedicated alphabetic keyboard of this pocket calculator allows you to enter the input conveniently. The multi-line display of this clamshell calculator displays all the levels of the calculation.

The HP-18C was the first in a series of "clamshell" calculators produced by HP. An advanced business model, the HP-18C calculator had a "clamshell" design, opening like a book with two keyboards facing each other inside. It included graphing and a date-time-alarm feature similar to a personal organizer.

Press and hold ON and press the fourth menu key from the left. The calculator will beep and display a series of vertical bars. You can now press any key to step through a series of tests (each with a different display - one blank.)

Would anyone have information on what type/size of battery is needed for the HP 18-C? I know that 3 batteries are required, but I don't know what size of battery. Thanks! You should use Type "N" Batteries (NO RECHARGABLES). They are also called "LADY" cells. A third mark on the batteries, which I never heard of, is "AM5" Voltage: 1.5V .