# Colophon

**Summary:** The colophon contains a brief statement on who we are and what we used to build our website and service.

**Last updated:** 2025-03-26

UNLESS is a trade name of *Rocket Launcher* (international trademarks pending). Rocket Launcher is a company registered at the Chamber of Commerce in Amsterdam, The Netherlands, under registration number __65190645__ . Our VAT number is __NL856013389B01__.

## Adresses
The company is registered at the following address.

Rocket Launcher BV\
C. Kruyswijkstraat 31\
1022 KJ Amsterdam\
The Netherlands

However, we are headquartered at the Panamalaan, in a bright red building in the popular east side of Amsterdam. You can visit us there. Make sure to check who will be in, as we are pretty hybrid!

Unless\
Panamalaan 8-D\
1019 AZ Amsterdam\
The Netherlands

## About Rocket Launcher
Rocket Launcher was started by [Marcel Panse](https://www.linkedin.com/in/marcelpanse/ "Marcel Panse") and [Sander Nagtegaal](https://www.linkedin.com/in/centrical/ "Sander Nagtegaal"), as the holding company for their brand Unless. There is now a small, but [highly effective team](https://unless.com/en/team/ "Team"). Read more [about the company](https://unless.com/en/about-us/ "About us"), or check out the [history of the product](https://unless.com/en/roadmap/ "Roadmap").

### About this website and the service
This website is built with Astro and deployed as static files to S3. The underlying UNLESS service is based on a serverless architecture using S3, Cloudfront, Amazon API Gateway, Lambda functions, DynamoDb, Firehose, Redshift and Bedrock. These are all services offered by [Amazon Web Services](https://aws.amazon.com/ "Amazon Web Services"). Besides that, it uses several AI models offered by vendors like AWS, Microsoft, and Google - in a very decoupled way so that your data stays safe. 

### About our jumbotron pattern
An aperiodic monotile, commonly known as an ‘einstein,’ is a shape capable of tiling the plane exclusively in a non-periodic manner. Our jumbotron pattern features the first true aperiodic monotile: a shape that naturally enforces aperiodicity through its own geometry, without the need for additional constraints such as matching conditions. 

The pattern incorporates a polykite, referred to as ‘hats,’ developed through multiple rounds of substitution. This work is based on the scientific contributions of David Smith, Joseph Samuel Myers, Craig S. Kaplan, and Chaim Goodman-Strauss.