# Sources

The figure was generated with Claude Opus 5.5 from the model's own knowledge, without consulting sources. The links below were added afterwards, one per way, so each entry can be checked. All of them opened on 2 November 2026.

| Way | Year in the figure | Reference |
|---|---|---|
| COBOL CONFIGURATION SECTION | 1960 | <https://en.wikipedia.org/wiki/COBOL> |
| Conditional assembly | 1964 | <https://en.wikipedia.org/wiki/IBM_Basic_assembly_language_and_successors> |
| JCL DD statements | 1964 | <https://en.wikipedia.org/wiki/Job_Control_Language> |
| OS/360 SYSGEN | 1966 | <https://en.wikipedia.org/wiki/OS/360_and_successors> |
| PL/I preprocessor | 1966 | <https://en.wikipedia.org/wiki/PL/I_preprocessor> |
| Inheritance and subclassing | 1967 | <https://en.wikipedia.org/wiki/Simula> |
| CLI options | 1971 | <https://en.wikipedia.org/wiki/Command-line_interface> |
| C preprocessor | 1973 | <https://en.wikipedia.org/wiki/C_preprocessor> |
| make variables | 1976 | <https://en.wikipedia.org/wiki/Make_(software)> |
| m4 | 1977 | <https://en.wikipedia.org/wiki/M4_(computer_language)> |
| crontab | 1979 | <https://en.wikipedia.org/wiki/Cron> |
| Environment variables | 1979 | <https://en.wikipedia.org/wiki/Environment_variable> |
| Shell rc files | 1979 | <https://en.wikipedia.org/wiki/Bourne_shell> |
| vi .exrc | 1979 | <https://en.wikipedia.org/wiki/Vi_(text_editor)> |
| BSD kernel config(8) | 1980 | <https://man.freebsd.org/cgi/man.cgi?query=config&sektion=8> |
| AUTOEXEC.BAT | 1981 | <https://en.wikipedia.org/wiki/AUTOEXEC.BAT> |
| CONFIG.SYS | 1983 | <https://en.wikipedia.org/wiki/CONFIG.SYS> |
| sendmail.cf | 1983 | <https://en.wikipedia.org/wiki/Sendmail> |
| SysV inittab | 1983 | <https://en.wikipedia.org/wiki/Init> |
| BIOS setup (CMOS) | 1984 | <https://en.wikipedia.org/wiki/BIOS> |
| GNU Emacs init file | 1985 | <https://www.gnu.org/software/emacs/manual/html_node/emacs/Init-File.html> |
| INI files | 1985 | <https://en.wikipedia.org/wiki/INI_file> |
| inetd.conf | 1986 | <https://en.wikipedia.org/wiki/Inetd> |
| Frame technology | 1987 | <https://en.wikipedia.org/wiki/Frame_technology_(software_engineering)> |
| VHDL generics | 1987 | <https://en.wikipedia.org/wiki/VHDL> |
| X resources | 1987 | <https://en.wikipedia.org/wiki/X_resources> |
| Dynamic plugins (dlopen) | 1988 | <https://en.wikipedia.org/wiki/Dynamic_loading> |
| POSIX locale variables | 1988 | <https://en.wikipedia.org/wiki/Locale_(computer_software)> |
| SNMP SET and MIBs | 1988 | <https://www.rfc-editor.org/rfc/rfc1067> |
| Tcl as embedded config | 1988 | <https://en.wikipedia.org/wiki/Tcl> |
| Property lists | 1989 | <https://en.wikipedia.org/wiki/Property_list> |
| Feature models (FODA) | 1990 | <https://insights.sei.cmu.edu/library/feature-oriented-domain-analysis-foda-feasibility-study/> |
| Fortran NAMELIST | 1990 | <https://en.wikipedia.org/wiki/Fortran> |
| Haskell type classes | 1990 | <https://en.wikipedia.org/wiki/Type_class> |
| Autoconf | 1991 | <https://en.wikipedia.org/wiki/Autoconf> |
| C++ templates | 1991 | <https://en.wikipedia.org/wiki/Template_(C%2B%2B)> |
| Kernel command line | 1992 | <https://docs.kernel.org/admin-guide/kernel-parameters.html> |
| Linux make config (CML1) | 1992 | <https://en.wikipedia.org/wiki/Kconfig> |
| Windows Registry | 1992 | <https://en.wikipedia.org/wiki/Windows_Registry> |
| CFEngine | 1993 | <https://en.wikipedia.org/wiki/CFEngine> |
| Lua as config language | 1993 | <https://www.lua.org/history.html> |
| sysctl | 1993 | <https://en.wikipedia.org/wiki/Sysctl> |
| Abstract Factory pattern | 1994 | <https://en.wikipedia.org/wiki/Abstract_factory_pattern> |
| Automake | 1994 | <https://en.wikipedia.org/wiki/Automake> |
| Bridge pattern | 1994 | <https://en.wikipedia.org/wiki/Bridge_pattern> |
| Decorator pattern | 1994 | <https://en.wikipedia.org/wiki/Decorator_pattern> |
| Device tree | 1994 | <https://en.wikipedia.org/wiki/Devicetree> |
| robots.txt | 1994 | <https://en.wikipedia.org/wiki/Robots.txt> |
| Strategy pattern | 1994 | <https://en.wikipedia.org/wiki/Strategy_pattern> |
| Template Method pattern | 1994 | <https://en.wikipedia.org/wiki/Template_method_pattern> |
| Apache httpd.conf | 1995 | <https://httpd.apache.org/docs/current/configuring.html> |
| gettext message catalogs | 1995 | <https://en.wikipedia.org/wiki/Gettext> |
| PAM configuration | 1995 | <https://en.wikipedia.org/wiki/Pluggable_authentication_module> |
| Ruby open classes | 1995 | <https://en.wikipedia.org/wiki/Monkey_patch> |
| Verilog parameters and `ifdef | 1995 | <https://en.wikipedia.org/wiki/Verilog> |
| Database server config | 1996 | <https://www.postgresql.org/docs/current/config-setting.html> |
| HTTP content negotiation | 1996 | <https://www.rfc-editor.org/rfc/rfc1945> |
| Java .properties | 1996 | <https://en.wikipedia.org/wiki/.properties> |
| Java system properties | 1996 | <https://docs.oracle.com/javase/tutorial/essential/environment/sysprop.html> |
| Quake console variables | 1996 | <https://en.wikipedia.org/wiki/Quake_engine> |
| Java ResourceBundle | 1997 | <https://docs.oracle.com/javase/8/docs/api/java/util/ResourceBundle.html> |
| php.ini | 1998 | <https://www.php.net/manual/en/configuration.file.php> |
| XML as config format | 1998 | <https://www.w3.org/TR/1998/REC-xml-19980210> |
| eCos CDL | 1999 | <https://en.wikipedia.org/wiki/ECos> |
| HotSpot -XX flags | 1999 | <https://en.wikipedia.org/wiki/HotSpot_(virtual_machine)> |
| XML deployment descriptors | 1999 | <https://en.wikipedia.org/wiki/Deployment_descriptor> |
| Apache Ant properties | 2000 | <https://en.wikipedia.org/wiki/Apache_Ant> |
| CMake options | 2000 | <https://en.wikipedia.org/wiki/CMake> |
| CML2 | 2000 | <http://www.catb.org/~esr/cml2/> |
| debconf | 2000 | <https://wiki.debian.org/debconf> |
| Group Policy | 2000 | <https://en.wikipedia.org/wiki/Group_Policy> |
| JMX MBeans | 2000 | <https://en.wikipedia.org/wiki/Java_Management_Extensions> |
| OSGi bundles | 2000 | <https://en.wikipedia.org/wiki/OSGi> |
| SELinux policy | 2000 | <https://en.wikipedia.org/wiki/Security-Enhanced_Linux> |
| AspectJ | 2001 | <https://en.wikipedia.org/wiki/AspectJ> |
| Eclipse extension points | 2001 | <https://en.wikipedia.org/wiki/Eclipse_(software)> |
| log4j configuration | 2001 | <https://en.wikipedia.org/wiki/Log4j> |
| SCons | 2001 | <https://en.wikipedia.org/wiki/SCons> |
| XML Schema (XSD) | 2001 | <https://en.wikipedia.org/wiki/XML_Schema_(W3C)> |
| YAML | 2001 | <https://en.wikipedia.org/wiki/YAML> |
| .NET app.config / web.config | 2002 | <https://learn.microsoft.com/en-us/dotnet/framework/configure-apps/> |
| C# conditional compilation | 2002 | <https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/preprocessor-directives> |
| GConf | 2002 | <https://en.wikipedia.org/wiki/GConf> |
| Gentoo USE flags | 2002 | <https://wiki.gentoo.org/wiki/USE_flag> |
| Java Preferences API | 2002 | <https://docs.oracle.com/javase/8/docs/api/java/util/prefs/Preferences.html> |
| Kconfig | 2002 | <https://docs.kernel.org/kbuild/kconfig-language.html> |
| Mozilla preferences (about:config) | 2002 | <https://support.mozilla.org/en-US/kb/about-config-editor-firefox> |
| AHEAD feature modules | 2003 | <https://en.wikipedia.org/wiki/Feature-oriented_programming> |
| Nix expressions | 2003 | <https://en.wikipedia.org/wiki/Nix_(package_manager)> |
| udev rules | 2003 | <https://en.wikipedia.org/wiki/Udev> |
| XDG Base Directory | 2003 | <https://specifications.freedesktop.org/basedir-spec/latest/> |
| BitBake / OpenEmbedded | 2004 | <https://en.wikipedia.org/wiki/BitBake> |
| Java generics | 2004 | <https://en.wikipedia.org/wiki/Generics_in_Java> |
| nginx.conf | 2004 | <https://nginx.org/en/docs/beginners_guide.html> |
| Rails environments | 2004 | <https://guides.rubyonrails.org/configuring.html> |
| Scala traits and mixins | 2004 | <https://en.wikipedia.org/wiki/Trait_(computer_programming)> |
| Spring DI container | 2004 | <https://en.wikipedia.org/wiki/Spring_Framework> |
| AUTOSAR ECU configuration | 2005 | <https://en.wikipedia.org/wiki/AUTOSAR> |
| Django settings module | 2005 | <https://docs.djangoproject.com/en/stable/topics/settings/> |
| FeatureC++ | 2005 | <https://doi.org/10.1007/11561347_10> |
| FeatureIDE | 2005 | <https://featureide.github.io/> |
| git config | 2005 | <https://git-scm.com/docs/git-config> |
| launchd plists | 2005 | <https://en.wikipedia.org/wiki/Launchd> |
| Maven profiles | 2005 | <https://maven.apache.org/guides/introduction/introduction-to-profiles.html> |
| Maven settings.xml | 2005 | <https://maven.apache.org/settings.html> |
| MSBuild conditions | 2005 | <https://learn.microsoft.com/en-us/visualstudio/msbuild/msbuild-conditions> |
| Orthogonal variability model | 2005 | <https://link.springer.com/book/10.1007/3-540-28901-1> |
| Puppet manifests | 2005 | <https://en.wikipedia.org/wiki/Puppet_(software)> |
| Python entry points | 2005 | <https://packaging.python.org/en/latest/specifications/entry-points/> |
| Python extras | 2005 | <https://packaging.python.org/en/latest/specifications/dependency-specifiers/> |
| Xcode build configurations | 2005 | <https://developer.apple.com/documentation/xcode/adding-a-build-configuration-file-to-your-project> |
| Annotation-based configuration | 2006 | <https://en.wikipedia.org/wiki/Jakarta_EE> |
| Java ServiceLoader | 2006 | <https://docs.oracle.com/javase/8/docs/api/java/util/ServiceLoader.html> |
| JSON config | 2006 | <https://www.rfc-editor.org/rfc/rfc4627> |
| NETCONF / YANG | 2006 | <https://www.rfc-editor.org/rfc/rfc4741> |
| Upstart jobs | 2006 | <https://en.wikipedia.org/wiki/Upstart_(software)> |
| Guice modules | 2007 | <https://en.wikipedia.org/wiki/Google_Guice> |
| Android resource qualifiers | 2008 | <https://developer.android.com/guide/topics/resources/providing-resources> |
| Android system properties | 2008 | <https://source.android.com/docs/core/architecture/configuration/sysprops-apis> |
| App Engine app.yaml | 2008 | <https://cloud.google.com/appengine/docs/standard/reference/app-yaml> |
| App manifests (Android / iOS) | 2008 | <https://developer.android.com/guide/topics/manifest/manifest-intro> |
| CIDE colored annotations | 2008 | <https://doi.org/10.1145/1368088.1368131> |
| Jinja2 templates | 2008 | <https://jinja.palletsprojects.com/> |
| ZooKeeper | 2008 | <https://en.wikipedia.org/wiki/Apache_ZooKeeper> |
| Chef | 2009 | <https://en.wikipedia.org/wiki/Progress_Chef> |
| cloud-init | 2009 | <https://cloudinit.readthedocs.io/en/latest/> |
| Feature toggles | 2009 | <https://martinfowler.com/articles/feature-toggles.html> |
| FeatureHouse | 2009 | <https://doi.org/10.1109/ICSE.2009.5070523> |
| Homebrew install options | 2009 | <https://en.wikipedia.org/wiki/Homebrew_(package_manager)> |
| JSON Schema | 2009 | <https://json-schema.org/> |
| A/B testing platforms | 2010 | <https://en.wikipedia.org/wiki/A/B_testing> |
| Chrome flags | 2010 | <https://developer.chrome.com/docs/web-platform/chrome-flags> |
| Clafer | 2010 | <https://www.clafer.org/> |
| Delta-oriented programming | 2010 | <https://doi.org/10.1007/978-3-642-15579-6_6> |
| GSettings / dconf | 2010 | <https://en.wikipedia.org/wiki/Dconf> |
| package.json and .npmrc | 2010 | <https://docs.npmjs.com/cli/configuring-npm/npmrc> |
| systemd units | 2010 | <https://en.wikipedia.org/wiki/Systemd> |
| tox environments | 2010 | <https://tox.wiki/> |
| Vagrantfile | 2010 | <https://en.wikipedia.org/wiki/Vagrant_(software)> |
| AWS CloudFormation | 2011 | <https://en.wikipedia.org/wiki/AWS_CloudFormation> |
| CI build matrix | 2011 | <https://en.wikipedia.org/wiki/Travis_CI> |
| Procfile | 2011 | <https://devcenter.heroku.com/articles/procfile> |
| Salt states | 2011 | <https://en.wikipedia.org/wiki/Salt_(software)> |
| Spring profiles | 2011 | <https://docs.spring.io/spring-boot/reference/features/profiles.html> |
| Twelve-factor env config | 2011 | <https://12factor.net/config> |
| Ansible | 2012 | <https://en.wikipedia.org/wiki/Ansible_(software)> |
| Conda environments | 2012 | <https://docs.conda.io/projects/conda/en/latest/user-guide/tasks/manage-environments.html> |
| CSS media queries | 2012 | <https://www.w3.org/TR/2012/REC-css3-mediaqueries-20120619/> |
| CVL | 2012 | <https://doi.org/10.1145/2364412.2364462> |
| EditorConfig | 2012 | <https://editorconfig.org/> |
| GNU Guix | 2012 | <https://en.wikipedia.org/wiki/GNU_Guix> |
| Go build constraints | 2012 | <https://pkg.go.dev/cmd/go#hdr-Build_constraints> |
| Gradle build scripts | 2012 | <https://en.wikipedia.org/wiki/Gradle> |
| HOCON | 2012 | <https://github.com/lightbend/config/blob/main/HOCON.md> |
| JSON5 | 2012 | <https://json5.org/> |
| Netflix Archaius | 2012 | <https://github.com/Netflix/archaius> |
| webpack config | 2012 | <https://en.wikipedia.org/wiki/Webpack> |
| Yeoman generators | 2012 | <https://en.wikipedia.org/wiki/Yeoman_(computing)> |
| Cookiecutter templates | 2013 | <https://github.com/cookiecutter/cookiecutter> |
| Dockerfile ENV and ARG | 2013 | <https://docs.docker.com/reference/dockerfile/> |
| ESLint config | 2013 | <https://en.wikipedia.org/wiki/ESLint> |
| etcd / Consul KV | 2013 | <https://etcd.io/> |
| Meson options | 2013 | <https://mesonbuild.com/Build-options.html> |
| NODE_ENV dead-code elimination | 2013 | <https://nodejs.org/en/learn/getting-started/nodejs-the-difference-between-development-and-production> |
| Spring @Conditional | 2013 | <https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/context/annotation/Conditional.html> |
| TOML | 2013 | <https://en.wikipedia.org/wiki/TOML> |
| Android build variants | 2014 | <https://developer.android.com/build/build-variants> |
| ARM templates | 2014 | <https://learn.microsoft.com/en-us/azure/azure-resource-manager/templates/overview> |
| direnv | 2014 | <https://direnv.net/> |
| Docker Compose | 2014 | <https://docs.docker.com/compose/> |
| Feature flag services | 2014 | <https://launchdarkly.com/> |
| Jsonnet | 2014 | <https://jsonnet.org/> |
| nftables rules | 2014 | <https://en.wikipedia.org/wiki/Nftables> |
| pre-commit config | 2014 | <https://pre-commit.com/> |
| Spring Boot auto-configuration | 2014 | <https://docs.spring.io/spring-boot/reference/using/auto-configuration.html> |
| Spring Cloud Config | 2014 | <https://spring.io/projects/spring-cloud-config> |
| Swift conditional compilation | 2014 | <https://docs.swift.org/swift-book/documentation/the-swift-programming-language/statements/> |
| Terraform (HCL) | 2014 | <https://en.wikipedia.org/wiki/Terraform_(software)> |
| .bazelrc | 2015 | <https://bazel.build/run/bazelrc> |
| Babel config | 2015 | <https://babeljs.io/docs/configuration> |
| Bazel select() | 2015 | <https://bazel.build/docs/configurable-attributes> |
| browserslist | 2015 | <https://github.com/browserslist/browserslist> |
| Cargo features | 2015 | <https://doc.rust-lang.org/cargo/reference/features.html> |
| CSS custom properties | 2015 | <https://www.w3.org/TR/css-variables-1/> |
| GitLab CI pipelines | 2015 | <https://docs.gitlab.com/ci/yaml/> |
| HashiCorp Vault | 2015 | <https://developer.hashicorp.com/vault/docs> |
| Helm values | 2015 | <https://en.wikipedia.org/wiki/Helm_(package_manager)> |
| Kubernetes Secrets | 2015 | <https://kubernetes.io/docs/concepts/configuration/secret/> |
| Rust cfg attributes | 2015 | <https://doc.rust-lang.org/reference/conditional-compilation.html> |
| Rust traits and generics | 2015 | <https://doc.rust-lang.org/book/ch10-00-generics.html> |
| Serverless Framework | 2015 | <https://en.wikipedia.org/wiki/Serverless_Framework> |
| SOPS | 2015 | <https://github.com/getsops/sops> |
| Spack variants | 2015 | <https://spack.readthedocs.io/en/latest/> |
| Starlark | 2015 | <https://github.com/bazelbuild/starlark> |
| tsconfig.json | 2015 | <https://www.typescriptlang.org/tsconfig/> |
| Unleash | 2015 | <https://github.com/Unleash/unleash> |
| VS Code settings | 2015 | <https://code.visualstudio.com/docs/configure/settings> |
| appsettings.json | 2016 | <https://learn.microsoft.com/en-us/aspnet/core/fundamentals/configuration/> |
| Firebase Remote Config | 2016 | <https://firebase.google.com/docs/remote-config> |
| Jenkinsfile | 2016 | <https://www.jenkins.io/doc/book/pipeline/jenkinsfile/> |
| Kubernetes ConfigMap | 2016 | <https://kubernetes.io/docs/concepts/configuration/configmap/> |
| Open Policy Agent (Rego) | 2016 | <https://www.openpolicyagent.org/docs/> |
| pyproject.toml | 2016 | <https://peps.python.org/pep-0518/> |
| AWS SSM Parameter Store | 2017 | <https://docs.aws.amazon.com/systems-manager/latest/userguide/systems-manager-parameter-store.html> |
| C++ if constexpr | 2017 | <https://en.cppreference.com/w/cpp/language/if> |
| Dhall | 2017 | <https://dhall-lang.org/> |
| Docker multi-stage targets | 2017 | <https://docs.docker.com/build/building/multi-stage/> |
| Envoy xDS | 2017 | <https://www.envoyproxy.io/docs/envoy/latest/api-docs/xds_protocol> |
| Kotlin expect/actual | 2017 | <https://kotlinlang.org/docs/multiplatform/multiplatform-expect-actual.html> |
| ksonnet | 2017 | <https://github.com/ksonnet/ksonnet> |
| Kubernetes CRDs and operators | 2017 | <https://kubernetes.io/docs/concepts/extend-kubernetes/api-extension/custom-resources/> |
| MicroProfile Config | 2017 | <https://microprofile.io/specifications/config/> |
| Prettier config | 2017 | <https://prettier.io/docs/configuration> |
| gin-config | 2018 | <https://github.com/google/gin-config> |
| Kustomize | 2018 | <https://kustomize.io/> |
| Pulumi | 2018 | <https://en.wikipedia.org/wiki/Pulumi> |
| AWS AppConfig | 2019 | <https://docs.aws.amazon.com/appconfig/latest/userguide/what-is-appconfig.html> |
| AWS CDK | 2019 | <https://docs.aws.amazon.com/cdk/v2/guide/home.html> |
| CUE | 2019 | <https://cuelang.org/> |
| Dev containers | 2019 | <https://containers.dev/> |
| GitHub Actions workflows | 2019 | <https://docs.github.com/en/actions> |
| Hydra | 2019 | <https://hydra.cc/> |
| Node conditional exports | 2019 | <https://nodejs.org/api/packages.html#conditional-exports> |
| Bicep | 2020 | <https://learn.microsoft.com/en-us/azure/azure-resource-manager/bicep/overview> |
| LLM sampling parameters | 2020 | <https://github.com/openai/openai-python> |
| Vite config | 2020 | <https://vite.dev/config/> |
| Nix flakes | 2021 | <https://nix.dev/concepts/flakes> |
| UVL | 2021 | <https://universal-variability-language.github.io/> |
| KCL | 2022 | <https://www.kcl-lang.io/> |
| OpenFeature | 2022 | <https://openfeature.dev/> |
| Prompt templates | 2022 | <https://python.langchain.com/docs/concepts/prompt_templates/> |
| LLM system prompts | 2023 | <https://platform.openai.com/docs/guides/text> |
| Nickel | 2023 | <https://nickel-lang.org/> |
| .clinerules | 2024 | <https://docs.cline.bot/> |
| .cursorrules | 2024 | <https://docs.cursor.com/context/rules> |
| .windsurfrules | 2024 | <https://docs.windsurf.com/windsurf/cascade/memories> |
| copilot-instructions.md | 2024 | <https://docs.github.com/en/copilot/customizing-copilot/adding-repository-custom-instructions-for-github-copilot> |
| llms.txt | 2024 | <https://llmstxt.org/> |
| MCP server config | 2024 | <https://modelcontextprotocol.io/> |
| Pkl | 2024 | <https://pkl-lang.org/> |
| Agent settings and hooks | 2025 | <https://docs.anthropic.com/en/docs/claude-code/settings> |
| Agent skills (SKILL.md) | 2025 | <https://docs.anthropic.com/en/docs/agents-and-tools/agent-skills/overview> |
| AGENTS.md | 2025 | <https://agents.md/> |
| CLAUDE.md | 2025 | <https://docs.anthropic.com/en/docs/claude-code/memory> |
| Custom agents and prompt files | 2025 | <https://code.visualstudio.com/docs/copilot/customization/prompt-files> |
| GEMINI.md | 2025 | <https://github.com/google-gemini/gemini-cli> |
| Apple configuration profiles | — | <https://support.apple.com/guide/deployment/intro-to-device-management-profiles-depc0aadd3fe/web> |
| Browser enterprise policies | — | <https://chromeenterprise.google/policies/> |
| Clone-and-own variants | — | <https://doi.org/10.1109/CSMR.2013.13> |
| Gears | — | <https://biglever.com/> |
| GN build arguments | — | <https://gn.googlesource.com/gn/+/main/docs/reference.md> |
| GRUB configuration | — | <https://en.wikipedia.org/wiki/GNU_GRUB> |
| Java static final flags | — | <https://docs.oracle.com/javase/specs/jls/se8/html/jls-13.html> |
| Linux kernel module parameters | — | <https://docs.kernel.org/admin-guide/kernel-parameters.html> |
| Network device running/startup config | — | <https://en.wikipedia.org/wiki/Cisco_IOS> |
| papermill notebook parameters | — | <https://papermill.readthedocs.io/> |
| Preferences dialogs | — | <https://en.wikipedia.org/wiki/Dialog_box> |
| Program parameters (variables and constants) | — | <https://en.wikipedia.org/wiki/Parameter_(computer_programming)> |
| pure::variants | — | <https://www.pure-systems.com/> |
| Python optimize flag (-O, __debug__) | — | <https://en.wikipedia.org/wiki/Python_(programming_language)> |
| Reload on SIGHUP | — | <https://en.wikipedia.org/wiki/SIGHUP> |
| Request parameters and cookies | — | <https://en.wikipedia.org/wiki/Query_string> |
| Settings stored in an app database | — | <https://en.wikipedia.org/wiki/WordPress> |
| Snakemake config | — | <https://snakemake.readthedocs.io/en/stable/snakefiles/configuration.html> |
| syslog.conf | — | <https://en.wikipedia.org/wiki/Syslog> |
| U-Boot environment | — | <https://en.wikipedia.org/wiki/Das_U-Boot> |

## Events

The events drawn as red lines (System/360, Unix, IBM PC, the Web and Linux, Rails, AWS EC2, Twelve-Factor App, Docker, Kubernetes, GitOps, ChatGPT) have no reference attached yet.