How Apple’s Oldest Employee Designed the Calculator App

In 1976, Steve Jobs and his friend Wozniak

A corporate Apple computer built in one’s home garage.

It’s a company, but it makes PCs at the level of home craftsmanship.

I started recruiting young and smart colleagues.

One of them was born in 1976 at the age of 14.

Joined Apple with employee number 8

Still working at Apple in 2025

Apple’s longest-serving employee

Chris Espinosa.

A few years later, it went beyond a handmade PC and had its own GUI.

Apple, which created the OS, made it a basic program

I’m going to create several programs.

Among them, the program Espinosa was responsible for was the calculator.

“”Hey, is this the design of the calculator?

However, Steve Jobs was

in calculator design

I found fault with each and every one of them.

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No matter how many days it takes to create the final design,

Jobs was not satisfied with the calculator’s design.

Espinosa was furious and used his final special move.

Instead of designing a calculator

“”Steve Jobs’ own calculator design program””

make

Jobs was told, “If you ask me, you will design it yourself.”

Jobs used this program

He started making a calculator with a design that satisfied him the most.

The design completed in 10 minutes became the standard calculator design for Mac OS for the next 15 years.