Added more stuff for slides

docs/slides/README.md

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+# SLS Slide Show
+
+[sls.purplecello.org/slides/SLIDES.html](https://sls.purplecello.org/slides/SLIDES.html)  
+[sls.purplecello.org/slides/YREA SLS.pdf](https://sls.purplecello.org/slides/YREA%20SLS.pdf)
+
+- https://github.com/marp-team/marp
+- https://github.com/marp-team/marp-cli/

docs/slides/SLIDES.md

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+---
+theme: default
+paginate: false
+backgroundColor: #fff
+backgroundImage: url('./background.svg')
+style: |
+  section.lead {
+    padding-bottom: 100px;
+  }
+  section {
+    padding-bottom: 225px;
+  }
+  section.lead > h1 > strong {
+    color: #375899;
+    font-size: 64px;
+  }
+  section.lead > p:nth-child(3) {
+    font-size: 16px;
+  }
+  h1 {
+    color: #001847;
+    padding-bottom: 0;
+    margin-bottom: 0;
+  }
+  small {
+    font-size: 16px;
+    padding-left: 16px;
+  }
+---
+
+![bg left:50% 90%](./sls.svg)
+
+# **YREA SLS**
+
+Kyler Olsen
+
+Fall 2025  
+Snow College  
+SE 3250  
+[sls.purplecello.org](https://sls.purplecello.org)
+
+---
+
+# RPL
+*HP Reverse Polish Lisp*
+
+- Based on LISP and Forth
+- Stack-oriented language with post-fix notation
+- Created by HP for their calculators
+
+<!-- ![bg right:35% 80%](./hp_calc_1.png) -->
+![bg right:35% 80%](./hp_calc_2.png)
+
+---
+
+# Project
+*YREA SLS*
+
+- Stack-oriented language with post-fix notation
+- C inspired Syntax
+- Can run on an embedded system
+
+---
+
+# Language
+*The C Language*
+
+- Systems Programming
+- Used for Python and PHP interpreters
+
+Excellent fit for my project!
+
+---
+
+# Language
+*The C Language*
+
+- Manual memory management is difficult to get right.
+- C development in a Linux environment was fun and rewarding.
+- In the end I had a running program on a RP2040.
+
+---
+
+# Port 1
+*Rust*
+
+- Systems Programming (Again)
+- Included build system
+- Memory safe with the barrow checker
+
+---
+
+# Port 1
+*Rust*
+
+- Unlike previous projects in Rust, I didn't fight the barrow checker this time.
+- I added exporting and importing the interpreter state in the REPL.
+
+---
+
+# Port 2
+*Python*
+
+- My favorite programming language (maybe C is a close second now)
+- This port was very easy for me to do.
+- I did add a calculator app as an alternative to the REPL or file execution.
+
+---
+
+# The End
+<small>You may clap now</small>