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 ## Topics covered
 
-* [Distributed systems](https://github.com/grimadas/BlockchainEngineering/blob/master/01_Intro_To_Distribtued_Systems.ipynb). Overlays and communication network. Introduction to simulation framework
+* [Distributed systems](https://github.com/grimadas/BlockchainEngineering/blob/master/01_Intro_To_Distributed_Systems.ipynb). Overlays and communication network. Introduction to simulation framework
 * [Gossip](https://github.com/grimadas/BlockchainEngineering/blob/master/02_Gossip_Services.ipynb). Convergence of the transactions, information
 * [Faults](https://github.com/grimadas/BlockchainEngineering/blob/master/03_Faults.ipynb) in distributed systems: crashes and disruptions
 * [Malicious](https://github.com/grimadas/BlockchainEngineering/blob/master/04_Byzantine.ipynb) nodes, adversary model