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•To keep your accounts secure, we recommend you do NOT store your personal access code for services such as bank-by-phone in a memory location.

Storing a Number in Memory

1.With the handset’s power on, press MEMORY. The keypad lights and MEM appears on the display.

Note: While you are storing a number in memory, if you do not press any button on the keypad within about 9 seconds, the key- pad light turns off and a buzz sounds. You must press MEMORY again so the keypad lights before you can store the telephone num- ber.

2.Enter the phone number you want to store. The number appears on the display.

Notes:

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•The phone does not dial the number at this point.

•If you enter a wrong digit, press FLASH/DEL to delete the last entered digit.

•If you enter more than 16 digits, the phone buzzes and the dis- play turns off. To dial a number with more than 16 digits, see “Chain Dialing.”

3.Press MEMORY again.

4.Enter the two-digit memory loca- tion number (01, 02 ..... 30) where you want to store the number. The index number appears, and a long beep sounds. The phone number is now stored in the memory.

5.Pull out the memory index card at the bottom of the base. Write the person’s or company’s name and index number on the sheet in pen- cil (in case you want to change it later).

6.Repeat Steps 1-5 to store other telephone numbers.

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Radio Shack ET-543 owner manual Storing a Number in Memory
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ET-543 specifications

The Radio Shack ET-543 is a noteworthy addition to the realm of portable electronic technology, particularly in the category of handheld calculators and educational tools. Launched during a vibrant era of innovation, the ET-543 encapsulates the spirit of the late 20th century, when personal computing and digital gadgets became increasingly accessible to the general public.

At its core, the ET-543 features a natural display that allows for easy viewing of calculations, making it user-friendly for both novices and seasoned users alike. The device is equipped with a combination of mathematical functions that streamline computations ranging from basic arithmetic to more complex algebraic operations. This wide array of capabilities makes the ET-543 an ideal choice for students and professionals who require a reliable tool for everyday calculations.

One of the standout technologies of the ET-543 is its robust memory function, which allows users to store multiple calculations for later use. This feature is particularly beneficial for users who engage in repetitive tasks or require a quick reference for previously calculated values. Coupled with its programmable functions, the ET-543 presents a versatile platform that can accommodate a range of mathematical needs.

In terms of design, the Radio Shack ET-543 boasts a compact and lightweight form factor, making it highly portable. This characteristic is essential for users who need a dependable calculator on the go, whether in the classroom, workplace, or during travel. The button layout is intuitive, allowing for easy navigation through various functions without the need for extensive training.

Another important aspect of the ET-543 is its educational value. The device serves as a practical teaching aid, helping students grasp fundamental concepts of mathematics and computation. Its durability and ease of use ensure that it stands up to repeated use in educational environments.

In summary, the Radio Shack ET-543 is more than just a calculator; it embodies the fusion of technological innovation and user-centric design. With features tailored to meet a variety of mathematical challenges, coupled with its portability and educational utility, the ET-543 remains a symbol of practical technology that resonates with users across generations.
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