Added RPi cheatsheets

books/free-programming-books-langs.md

@@ -26,6 +26,7 @@ That section got so big, we decided to split it into its own file, the [BY SUBJE
 * [Bash](#bash)
 * [Basic](#basic)
 * [BETA](#beta)
+* [Blockchain](#blockchain)
 * [C](#c)
 * [C#](#c-sharp)
 * [C++](#cpp)
@@ -403,6 +404,14 @@ That section got so big, we decided to split it into its own file, the [BY SUBJE
 * [Object-Oriented Programming in the BETA Programming Language](https://beta.cs.au.dk/Books/) - Ole Lehrmann Madsen, Birger Møller-Pedersen, Kristen Nygaard
 
 
+### Blockchain
+
+* [Blockchain for Dummies](https://www.ramonmillan.com/documentos/bibliografia/BlockchainForDummies_Wiley.pdf) - Tiana Laurence (PDF)
+* [Ethereum Decentralized Transaction Ledger official whitepaper](https://www.allcryptowhitepapers.com/wp-content/uploads/2018/05/Ethereum-Whitepaper.pdf) - Dr Gavin Wood (PDF)
+* [Ethereum Uniswap v2 Core whitepaper](https://uniswap.org/whitepaper.pdf) - Hayden Adams, Noah Zinsmeister, Dan Robinson (PDF)
+* [Introducing Ethereum and Solidity](https://the-eye.eu/public/Books/qt.vidyagam.es/library/humble-bitcoin-bundle/Introducing%20Ethereum%20and%20Solidity_%20Foud%20Blockchain%20Programming%20for%20Beginners/Introducing%20Ethereum%20and%20Solidity_%20Foundatiin%20Programming%20for%20Beginners%20-%20Chris%20Dannen.pdf) - Chris Dannen (PDF)
+
+
 ### C
 
 * [256-Color VGA Programming in C](http://www.brackeen.com/vga/) - David Brackeen

more/free-programming-cheatsheets.md

@@ -22,9 +22,11 @@
 * [Perl](#perl)
 * [Python](#python)
 * [R](#r)
+* [Raspberry Pi](#raspberry-pi)
 * [Ruby](#ruby)
 * [Rust](#rust)
 * [SQL](#sql)
+* [Tensorflow](#tensorflow)
 
 
 ### Artificial Intelligence
@@ -166,6 +168,15 @@
 * [All RStudio cheatsheets resources](https://www.rstudio.com/resources/cheatsheets) - RStudio.com (HTML site with PDF links)
 
 
+### Raspberry Pi
+
+* [Basic GPIO layout configuration cheatsheet](https://www.cl.cam.ac.uk/projects/raspberrypi/tutorials/robot/cheat_sheet/) - University of Cambridge Computer Laboratory Raspberry Pi Projects Cheatsheet (PDF)
+* [Other Raspberry Pi Commands cheatsheet](https://www.raspberrypistarterkits.com/wp-content/uploads/2018/01/raspberry-pi-commands-cheat-sheet.pdf) - RPi starter Kit (PDF)
+* [Raspberry Pi Basics cheatsheet](https://www.woolseyworkshop.com/wp-content/uploads/WoolseyWorkshop_Cheatsheet_RaspberryPiBasics_v1.4.pdf) - Woolsey Workshop (PDF)
+* [Raspberry Pi Different GPIO Configuration Combinations cheatsheet](https://static.raspberrypi.org/files/education/posters/GPIO_Zero_Cheatsheet.pdf) - GPIO Zero Cheatsheet (PDF)
+* [Top 50 General Commands for Raspberry Pi cheatsheet](https://projects-raspberry.com/wp-content/uploads/2018/05/Top-50-Raspberry-pi-commands-List-cheat-sheet.pdf) - Projects Raspberry (PDF)
+
+
 ### Ruby
 
 * [Ruby Cheat Sheet](https://www.codeconquest.com/wp-content/uploads/Ruby-Cheat-Sheet-by-CodeConquestDOTcom.pdf) - CodeConquest.com (PDF)
@@ -181,3 +192,10 @@
 * [MySQL Cheatsheet](https://s3-us-west-2.amazonaws.com/dbshostedfiles/dbs/sql_cheat_sheet_mysql.pdf) - Database Star (PDF)
 * [PostgreSQL Cheatsheet](https://s3-us-west-2.amazonaws.com/dbshostedfiles/dbs/sql_cheat_sheet_pgsql.pdf) - Database Star (PDF)
 * [SQL Cheatsheet](https://www.codecademy.com/learn/learn-sql/modules/learn-sql-manipulation/cheatsheet) - Codecademy (SQL)
+
+
+### TensorFlow
+
+* [Collection of 10 Tensorflow Cheat Sheets for Machine Learning](https://blog.finxter.com/tensorflow-cheat-sheets/#Cheat_Sheet_2_Altoros) (HTML site with PDF links)
+* [TensorFlow Quick Reference Table](https://secretdatascientist.com/tensor-flow-cheat-sheet/) (HTML Online site)
+* [TensorFlow v2.0 Cheat Sheet](https://storage.googleapis.com/kaggle-forum-message-attachments/889691/15952/19-04-11-Cheat-Sheet-TensorFlow-2-0.pdf) (PDF)