diff --git a/🧠-Educational.md b/🧠-Educational.md
index e74ad164..18941310 100644
--- a/🧠-Educational.md
+++ b/🧠-Educational.md
@@ -535,7 +535,7 @@
 * [CalculusMadeEasy](https://calculusmadeeasy.org) - Learn Calculus
 * [CLP](https://personal.math.ubc.ca/~CLP/) - Calculus Textbooks
 * [Mathematics Roadmap](https://github.com/TalalAlrawajfeh/mathematics-roadmap) - Mathematics Book Recommendations
-* [Converter Pro](https://f-droid.org/packages/com.ferrarid.converterpro/), [OneConverter](https://oneconverter.com/) or [ConvertAll](https://convertall.bellz.org/) - Unit Converters
+* [Converter Pro](https://f-droid.org/packages/com.ferrarid.converterpro/), [Rink](https://rinkcalc.app/), [Frink](https://frinklang.org/fsp/frink.fsp), [OneConverter](https://oneconverter.com/) or [ConvertAll](https://convertall.bellz.org/) - Unit Converters / Calculators
 * [MathJax](https://www.mathjax.org/) - JavaScript Math Display
 * [ISciDAVis](https://sourceforge.net/projects/scidavis/) - Scientific Data Plotter
 * [Approach0](https://approach0.xyz/search/) - Math Formula Search
@@ -1090,7 +1090,6 @@
 * [Copetti](https://www.copetti.org/) - In-depth Console Architecture Analysis / [GitHub](https://github.com/flipacholas/Architecture-of-consoles)
 * [Web Browser Engineering](https://browser.engineering/) - Learn about Browser Engineering
 * [OSDev Wiki](https://wiki.osdev.org/) - Operating System Dev Wiki
-* [OSTEP](https://pages.cs.wisc.edu/~remzi/OSTEP/) - Operating Systems Book
 * [Wi is Fi](https://www.wiisfi.com/) - Wi-Fi Educational Guide
 * [CPU Land](https://cpu.land/) - What Happens when you run Programs
 * [Computer Science Lecture Links](https://github.com/riti2409/Resources-for-preparation-Of-Placements)