In 1967, Texas Instruments created the very first handheld calculator, which could perform basic operations, like adding and subtracting.
In 1990, the company invented the first graphing calculator, the TI-81.
The newer models cost around $149.99 to $172.99. Even older models, like the TI-84 Plus, cost around $100.
The graphing calculator was meant to add complex functions (like sine and cosine graphs) as well as the basic operations to show the equations on a graph.
These graphing calculators are very useful for high-level math courses, including calculus and trig.
They provide a visual representation for students to see what they're learning.
They allow students to do complicated problems in a shorter amount of time, leading it to be less time-consuming.
If students become to dependent on their calculators, they might lose their ability to solve problems that can be done using mental math. They might become reliant on the calculator to do simple addition and subtraction. This could hinder them from developing their math skills.
#2: Global Positioning System (GPS)
Ivan Getting, Roger Easton, and Bradford Parkinson developed the Global Positioning System.
The idea was launched in 1973, and people started using it in the 1980s
A standard GPS costs around $100, and an advanced one costs up to $500
It is a system of satellites that orbit the Earth and allow people to pinpoint geographical locations.
It helps guide people to a destination by giving them the direction using the satellites.
It is connected to the phone, so it is portable and easily accessible.
Scientists can also use the GPS to measure volcanic activity and the movement of Earth's plates.
It can suffer from dead batteries, just like many other electronic devices.
It can break and stop working if it is dropped or gets wet.
#3: Automated Teller Machines (ATMs)
John Shepheard-Barron, a Scottish Inventor, got the idea of vending machines dispensing cash, just like candy.
A bank in London like the idea, and in 1967, the first ATM was installed.
Buying and installing a vending machine costs anywhere from $2000 to $15000
In some places, making a transaction can cost $1-$4.
The ATM allows customers to receive transactions on their own without a teller
They can automatically receive cash
Anyone with a debit card or a credit card can access ATMs
They allow you to receive cash instantly, especially if a store only accepts cash instead of credit cards.
They also allow you to deposit money into your account anytime
They are almost always accessible, 24/7, and are located in a lot of places, like the mall, airport, etc.
Many banks limit the amount of money you can withdraw per day. So if a person needs a lot of cash on hand, they might want to plan in advance to withdraw some money each day.