T-shirt to be given to thank Code Sprint volunteers for their time and effort at IETF 94 Code Sprint

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This customer received 36 t-shirt designs from 14 designers. They chose this t-shirt design from alan manninz as the winning design.
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T-shirt Design Brief
This is a t-shirt to be given to the IETF 94 Code Sprint volunteers.
What is the IETF?
The Internet Engineering Task Force (IETF) is a large open international community of network designers, operators, vendors, and researchers concerned with the evolution of the Internet architecture and the smooth operation of the Internet. It is open to any interested individual. The mission of the IETF is to make the Internet work better by producing high quality, relevant technical documents that influence the way people design, use, and manage the Internet. More information can be found at https://www.ietf.org.
What is IETF 94?
The IETF holds three face-to-face meetings a year, in locations around the world. IETF 94 will be the 94th face-to-face meeting of the IETF, and will be held in Yokohama, Japan. Information about IETF 94 can be found at https://www.ietf.org/meeting/94/index.html.
What is the Code Sprint?
The IETF Code Sprint is a one-day event held the day before the official IETF meeting kick-off where a bunch of hackers get together to work on code for the IETF tools and web site. All code will becomes part of the open source IETF tools.
Target Market(s)
Internet Engineers
Industry/Entity Type
Internet
Font styles to use
Look and feel
Each slider illustrates characteristics of the customer's brand and the style your logo design should communicate.
Elegant
Bold
Playful
Serious
Traditional
Modern
Personable
Professional
Feminine
Masculine
Colorful
Conservative
Economical
Upmarket
Requirements
Must have
- IETF logo, the words "IETF 94 Code Sprint"
Nice to have
- I would like to see elements of network design or coding incorporated. Also an image that represents Yokohama, Japan (perhaps something iconic from their skyline).
Should not have
- too many colors. Must look good on dark shirt and/or white shirt. Unlikely that it will be printed on bright shirt.