Saturday, May 2, 2026

Student’s 1987 Code Fix Led to Photoshop Creation

Thomas Knoll did not plan to create a major image editor. In 1987, while studying for his PhD at the University of Michigan, he faced a problem. His Macintosh Plus showed images only in black and white, which made his research difficult. To fix this, he wrote a small program called Display. This program allowed the screen to show shades of gray. This simple utility helped develop Adobe Photoshop.

Photoshop was first sold on February 19, 1990. For over 35 years, it has changed photography, publishing, film, and web design. Thomas Knoll’s story, shared in a 2015 interview, makes us understand the software’s important history.

Thomas started coding in high school and enjoyed photography since he was eleven. His brother, John Knoll, worked in special effects and saw the potential of Thomas’s program. He urged Thomas to combine all his image tools into one application to save time. This led to making Photoshop.

Adobe recognized the software’s value quickly and launched Photoshop 1.0 for Mac in February 1990. However, at that time, consumer digital cameras and printers were not available. The software became popular when affordable tech arrived in the early 1990s. Adobe has expanded Photoshop to many platforms and donated the original code to a museum to preserve its history.

Test Your Understanding

Start Quiz

Vocabulary List:
6 words · tap to reveal
ON

Accent

editor/ˈɛdətɚ/noun
a program or person who changes content

utility/juːˈtɪləti/noun
a small program that does one job

shades/ʃeɪdz/noun
slightly different degrees of color or light

potential/pəˈtɛnʃəl/noun
ability to become something or be successful

consumer/kənˈsuːmɚ/adjective
made for people who buy things

preserve/prɪˈzɝv/verb
to keep something safe for the future

How much do you know?

In what year was Photoshop first sold?
1987
1990
1995
2000
What was the name of the small program that Thomas Knoll wrote to show shades of gray?
Display
Photoshop
Image Gray
Color Display
Who urged Thomas Knoll to combine all his image tools into one application?
John Knoll
Adobe
His professor
A friend
What was the primary purpose of developing the Display program?
To create Photoshop
To show shades of gray
To edit videos
To fix printers
Which platform did Photoshop 1.0 launch for?
Windows
Mac
Linux
Android
In which field has Photoshop significantly impacted?
Gaming
Architecture
Photography
All of the above
Thomas Knoll developed Photoshop before he began his PhD studies.
Adobe Photoshop was first sold in 1990.
Thomas Knoll's brother worked in special effects.
Consumer digital cameras were widely available when Photoshop was launched.
Photoshop has never been recognized by Adobe as a valuable software.
Thomas Knoll started coding while he was in high school.
Thomas Knoll faced a problem with his Macintosh Plus showing images only in black and white, so he wrote a small program called to fix this.
Photoshop was first sold on 19, 1990.
John Knoll urged Thomas to combine all his image tools into one to save time.
Adobe launched Photoshop 1.0 for Mac in February
Affordable technology arrived in the early , helping Photoshop become popular.
Adobe has donated the original code of Photoshop to a to preserve its history.
This question is required

Test Your Understanding

Start Quiz
Vocabulary List:
6 words · tap to reveal
ON
Accent
editor/ˈɛdətɚ/noun
a program or person who changes content
utility/juːˈtɪləti/noun
a small program that does one job
shades/ʃeɪdz/noun
slightly different degrees of color or light
potential/pəˈtɛnʃəl/noun
ability to become something or be successful
consumer/kənˈsuːmɚ/adjective
made for people who buy things
preserve/prɪˈzɝv/verb
to keep something safe for the future

How much do you know?

In what year was Photoshop first sold?
1987
1990
1995
2000
What was the name of the small program that Thomas Knoll wrote to show shades of gray?
Display
Photoshop
Image Gray
Color Display
Who urged Thomas Knoll to combine all his image tools into one application?
John Knoll
Adobe
His professor
A friend
What was the primary purpose of developing the Display program?
To create Photoshop
To show shades of gray
To edit videos
To fix printers
Which platform did Photoshop 1.0 launch for?
Windows
Mac
Linux
Android
In which field has Photoshop significantly impacted?
Gaming
Architecture
Photography
All of the above
Thomas Knoll developed Photoshop before he began his PhD studies.
Adobe Photoshop was first sold in 1990.
Thomas Knoll's brother worked in special effects.
Consumer digital cameras were widely available when Photoshop was launched.
Photoshop has never been recognized by Adobe as a valuable software.
Thomas Knoll started coding while he was in high school.
Thomas Knoll faced a problem with his Macintosh Plus showing images only in black and white, so he wrote a small program called to fix this.
Photoshop was first sold on 19, 1990.
John Knoll urged Thomas to combine all his image tools into one to save time.
Adobe launched Photoshop 1.0 for Mac in February
Affordable technology arrived in the early , helping Photoshop become popular.
Adobe has donated the original code of Photoshop to a to preserve its history.
This question is required

Read More