Technology history for usaco.org
Stack size over time
From 4 detected technologies in Apr 2018 to 10 in Jun 2026.
Currently detected
- Apache HTTP Server since Apr 2018
- jQuery since Apr 2018
- MathJax since Apr 2018
- D3 since Jun 2018
- PHP since Jun 2018
- OpenSSL since Feb 2020
- Cloudflare since Sep 2020
- cdnjs since Nov 2021
- HTTP/3 since Sep 2022
- Cloudflare Browser Insights since Nov 2025
Previously used
- Cloudflare Network Error Logging Feb 2022 to Oct 2022 · 8 mo
- Wheelio Sep 2021 to Oct 2021 · 1 mo
- Nginx Jun 2020 to Aug 2020 · 2 mo
- Ubuntu Aug 2018 to Aug 2020 · 2 yrs
- Red Hat Apr 2018 to Jan 2020 · 1 yr
Timeline
2025 1 added
- added Cloudflare Browser Insights Nov 2025 · Analytics
2022 2 added · 1 dropped
- dropped Cloudflare Network Error Logging Dec 2022 · Issue trackers
- added HTTP/3 Sep 2022 · Miscellaneous
- added Cloudflare Network Error Logging Feb 2022 · Issue trackers
2021 3 added · 2 dropped
- dropped Wheelio Dec 2021 · Widgets
- added cdnjs Nov 2021 · CDN
- added Wheelio Sep 2021 · Widgets
- added D3 Jul 2021 · JavaScript graphics
- dropped D3 Mar 2021 · JavaScript graphics
2020 3 added · 3 dropped
- dropped Nginx Oct 2020 · Reverse proxies
- dropped Ubuntu Oct 2020 · Operating systems
- added Cloudflare Sep 2020 · CDN
- added Nginx Jun 2020 · Reverse proxies
- dropped Red Hat Mar 2020 · Operating Systems
- added OpenSSL Feb 2020 · Web Server Extensions
2019 7 added
- added Apache HTTP Server Mar 2019 · Web Servers
- added D3 Mar 2019 · JavaScript Graphics
- added jQuery Mar 2019 · JavaScript Libraries
- added MathJax Mar 2019 · JavaScript Graphics
- added PHP Mar 2019 · Programming Languages
- added Red Hat Mar 2019 · Operating Systems
- added Ubuntu Mar 2019 · Operating Systems