# Chapter 1: What is a Mainframe Today?

Imagine waking up every morning, reaching for your smartphone, checking your email, and sipping on your favourite coffee. Little do you know, a silent powerhouse called a mainframe is working behind the scenes to make it all happen seamlessly. Think of a mainframe as the superhero of computers, capable of handling massive amounts of data and transactions.

While they might not be as flashy or portable as your smartphone, these machines power many of the things we rely on every day. Imagine all of the banking transactions, airline reservations, and government records that are moving around the world in a moment. That's the power of the mainframe!

Here are some real-life examples of where you might encounter mainframes:

* When you swipe your credit card, the mainframe verifies your information and approves the transaction in milliseconds.
* When you book a flight, your reservation is processed and your seat is confirmed, thanks to the mainframe's lightning-fast speed.
* When you browse a massive online store, the mainframe retrieves millions of products and displays them on your screen in seconds.

These machines are robust, rugged, and always ready for action. You might not have heard about them, but they've been with you, quietly ensuring everything ticks smoothly from dawn till dusk. Join us on a journey to uncover the hidden marvels of the mainframe, a technological wizardry that's closer to your daily routine than you could ever imagine.

Some folks might dismiss mainframes as ancient relics, assuming they're outdated technology. But before we start exploring, let's take a moment to unravel the mystery as Rosalind, an IBM fellow, shares her insights on the subject.

<mark style="background-color:yellow;">Watch the video "Mainframe Myths Debunked" by Rosalind Radcliffe, and answer the following questions:</mark>&#x20;

1. <mark style="background-color:yellow;">How does the introduction of the Telum processor challenge the perception of mainframes being "old" systems?</mark>
2. <mark style="background-color:yellow;">In what ways does the script debunk the myth that mainframes are "expensive"?</mark>
3. <mark style="background-color:yellow;">How does the transaction processing efficiency of mainframes contribute to their modern capabilities?</mark>

{% embed url="<https://www.youtube.com/watch?v=3rVfUbDsdf8>" %}
Mainframe Myths Debunked in 5 Minutes
{% endembed %}

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![](https://2463249796-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FffFVkunetcqJRCQijzHk%2Fuploads%2Fkj05qEdKI6Z452P2R90J%2FMainframe_1_3D.png?alt=media\&token=885e60e3-e6b9-4481-8779-c38a690d6eae)  ![](https://2463249796-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FffFVkunetcqJRCQijzHk%2Fuploads%2FuQaP8eibvEQt8Xa7tATO%2FMainframe_2_3D.png?alt=media\&token=7b27f095-9c0d-478b-9877-09dea5c16312) &#x20;


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