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There are only 2 Hard Things in Computer Science

Size Guide
Sizing Guide

Gildan Ultra Cotton T-Shirt (G200)

Next Level Premium Short Sleeve T-Shirt (NL3600)

Next Level Premium Fitted Short Sleeve V-Neck (NL3200)

Gildan Ladies' 100% Cotton T-Shirt (G200L)

Gildan Long Sleeve Ultra Cotton T-Shirt (G240)

Gildan Pullover Hoodie 8 oz. (G185)

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There are only 2 hard things in computer science:

0. Cache invalidation
1. Naming things
7. Asynchronous calbacks
2. Off-by-one errors

Note: Certain variants may be out of stock due to supply chain disruption. These garments may be shipped with tear-away tags displaying “Bespoke” as the brand name, which offers comparable quality in every way.

An Amazing Cause
We donate 5% of our net profits to - a non-profit focused on making computer science more accessible.

Customer Reviews

Based on 5 reviews

My husband loved it ! Nailed the Christmas gift this year. Only caveat was the shipping took a really long time so it got it well after Christmas and well after the anticipated delivery date. Allow more time for shipping than you think you need. UPS needs to find a career that it enjoys. Shipping is not its strong suit.


I've ordered quite a few t-shirts from CodeTee and really enjoy the products. Always prompt shipping and never any issues with the t-shirts. I always get compliments and laughs from other developers. Would definitely recommend.


La camiseta es de una calidad excelente.


Just a great t-shirt - even if I had to explain it to my wife.


There are only 10 kinds of people in the world — those who understand binary; those who don't; and those who mistook this for a binary joke.

IF you understand this, you'll love this shirt OR mug . . .