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 The blockchain is an incorruptible digital ledger of economic transactions that can be programmed to record not just financial transactions but virtually everything of value (by [Don Tapscott](https://www.linkedin.com/pulse/whats-next-generation-internet-surprise-its-all-don-tapscott)).
 
-<font color=#0099ff size=3>**This is not a simple collection of Internet resources, but verified and organized data ensuring it's really suitable for your learning process and uesful for your development and application.**</font> 
+<font color=#0099ff size=3>**This is not a simple collection of Internet resources, but verified and organized data ensuring it's really suitable for your learning process and useful for your development and application.**</font> 
 
 ## Contents