diff --git a/README.md b/README.md
index 2e22ee3..273a608 100755
--- a/README.md
+++ b/README.md
@@ -497,6 +497,7 @@ Table of Contents
   - [CS 290 DataMining Lectures](https://www.youtube.com/playlist?list=PLB4CCA346A5741C4C)
   - [CS246 - Mining Massive Data Sets, Winter 2016, Stanford University](https://web.stanford.edu/class/cs246/) ([YouTube](https://www.youtube.com/channel/UC_Oao2FYkLAUlUVkBfze4jg/videos))
   - [Information Retrieval - Spring 2018 - ETH Zurich](https://www.youtube.com/playlist?list=PLzn6LN6WhlN1ktkDvNurPSDwTQ_oGQisn)
+  - [Information Retrieval - WS 2022/23 - Universität Freiburg](https://ad-wiki.informatik.uni-freiburg.de/teaching/InformationRetrievalWS2223)
   - [CAP6673 - Data Mining and Machine Learning - FAU](http://www.cse.fau.edu/~taghi/classes/cap6673/)([Video lectures](https://vimeo.com/album/1505953))
   - [CS 412 - Introduction to Data Mining - UIUC](https://www.youtube.com/playlist?list=PLIygTcviGPKDZi44-yuH2XH9UaHdaJkxs)
   - [CS 512 - Data Mining Principles - UIUC](https://github.com/spacemanidol/CS512DM/tree/main/lectures) ([YouTube](https://www.youtube.com/playlist?list=PLIygTcviGPKABUzEm9v1PuKLlb0AQ9tdH))
@@ -950,6 +951,7 @@ Table of Contents
 - [Columbia ELEN E6711 Stochastic Models in Information Systems fall 2005, by Yuliy Barsyhnikov](https://www.youtube.com/playlist?list=PL682UO4IMem9dvI-8vjxlPkM5onW9WoIp)
 - [Columbia ELEN E6717 Information Theory fall 2003, by Vittorio Castelli](https://www.youtube.com/playlist?list=PL682UO4IMem_IUZIFzlJi8vCTtS-Xi8eY)
 - [University of Washington EE514A/EE515A - Information Theory I/II fall 2013, by Jeff Bilmes](https://www.youtube.com/playlist?list=PLFze15KrfxbGsPDYxeLyeYorlHSBsTPv0)
+- [CMU 15 150 Principles of Functional Programming summer 2023, by Brandon Wu](https://www.youtube.com/playlist?list=PLsydD1kw8jng2t2G8USQNLz0faYZetPnH)
 - [CMU 21 738 Extremal Combinatorics spring 2020, by Po-Shen Loh](https://www.youtube.com/playlist?list=PLgTkKBA6LRqaGKITvQS1QuIBoEbOVwFTm)
 - [JHU Domain-Specific Languages (DSL) Class (Summer 2018)](https://www.youtube.com/playlist?list=PLW-6wqFEcgTqHMXV_8jI43QLkCv8VgqLk)
 - [Spring 2019 - Probabilistically Checkable and Interactive Proof Systems (Alessandro Chiesa)](https://www.youtube.com/playlist?list=PLkFD6_40KJIyWWtxCPBHwGsrutjvwM5_U)
@@ -1050,6 +1052,7 @@ Table of Contents
 - [Memory Systems Course - Technion, Summer 2018](https://www.youtube.com/playlist?list=PL5Q2soXY2Zi-IymxXpH_9vlZCOeA7Yfn9)
 - [UC Berkeley EECS16A Designing Information Devices and Systems I summer 2020, by Grace Kuo, Panos Zarkos, Urmita Sikder](https://www.youtube.com/playlist?list=PL682UO4IMem9_svw6nCsGOaDZaYSjpgcB)
 - [UC Berkeley EECS 16B Designing Information Devices and Systems II fall 2020, by Seth Sanders, Miki Lustig](https://www.youtube.com/playlist?list=PL682UO4IMem_QO6og7qXyvjMUHXNI7Hqs)
+- [ELEN E4810 - DIGITAL SIGNAL PROCESSING - Fall 2013 - Columbia](https://www.ee.columbia.edu/~dpwe/e4810/outline.html)
 - [ELEN E4896 - MUSIC SIGNAL PROCESSING - Spring 2016 - Columbia](https://www.ee.columbia.edu/~dpwe/e4896/outline.html)
 - [Columbia ELEN E6820 Speech and Audio Processing spring 2006, by Dan Ellis](https://www.youtube.com/playlist?list=PL682UO4IMem8IpOKncIUSEFsYWoJyS5ks)
 - [CMU 11 751 / 18 781 Speech Recognition and Understanding fall 2023, by Shinji Watanabe](https://www.youtube.com/playlist?list=PLfVqr2l0FG-tW8d5ZSz-_tCgQed_F1ndb) ([Fall 2022](https://www.youtube.com/playlist?list=PLfVqr2l0FG-u7chWKPQMDoT0o-I2ejxeK))