> For the complete documentation index, see [llms.txt](https://docs.ramsdenj.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ramsdenj.com/introduction-4/introduction-2.md).

# LLD

- [Composition and Polymorphism](https://docs.ramsdenj.com/introduction-4/introduction-2/composition-and-polymorphism.md)
- [SDLC](https://docs.ramsdenj.com/introduction-4/introduction-2/sdlc.md)
- [SOLID](https://docs.ramsdenj.com/introduction-4/introduction-2/solid.md)
- [Design Patterns](https://docs.ramsdenj.com/introduction-4/introduction-2/design-patterns.md)