diff --git a/Artificial Intelligence/Cheat Sheets for AI.pdf b/Artificial Intelligence/Cheat Sheets for AI.pdf
new file mode 100644
index 00000000..197065b9
Binary files /dev/null and b/Artificial Intelligence/Cheat Sheets for AI.pdf differ
diff --git a/Big Data Analytics/BIG Data Analytics.pdf b/Big Data Analytics/BIG Data Analytics.pdf
new file mode 100644
index 00000000..d777f213
Binary files /dev/null and b/Big Data Analytics/BIG Data Analytics.pdf differ
diff --git a/Big Data/AP.pdf b/Big Data/AP.pdf
new file mode 100644
index 00000000..64389259
Binary files /dev/null and b/Big Data/AP.pdf differ
diff --git a/Big Data/Big-Data-Cheat-Sheet.pdf b/Big Data/Big-Data-Cheat-Sheet.pdf
new file mode 100644
index 00000000..82d38628
Binary files /dev/null and b/Big Data/Big-Data-Cheat-Sheet.pdf differ
diff --git a/Big Data/Hortonworks.CheatSheet.SQLtoHive.pdf b/Big Data/Hortonworks.CheatSheet.SQLtoHive.pdf
new file mode 100644
index 00000000..d023bbcf
Binary files /dev/null and b/Big Data/Hortonworks.CheatSheet.SQLtoHive.pdf differ
diff --git a/Big Data/hadoop-hdfs-commands-cheatsheet.pdf b/Big Data/hadoop-hdfs-commands-cheatsheet.pdf
new file mode 100644
index 00000000..1d1649e5
Binary files /dev/null and b/Big Data/hadoop-hdfs-commands-cheatsheet.pdf differ
diff --git a/CBAP.pdf b/CBAP.pdf
new file mode 100644
index 00000000..5ec6169a
Binary files /dev/null and b/CBAP.pdf differ
diff --git a/Data Engineering/GDE.pdf b/Data Engineering/GDE.pdf
new file mode 100644
index 00000000..55352766
Binary files /dev/null and b/Data Engineering/GDE.pdf differ
diff --git a/Data Mining/Data Mining Process, Techniques, Tools.pdf b/Data Mining/Data Mining Process, Techniques, Tools.pdf
new file mode 100644
index 00000000..08731f34
Binary files /dev/null and b/Data Mining/Data Mining Process, Techniques, Tools.pdf differ
diff --git a/Data Mining/OLTP vs OLAP.pdf b/Data Mining/OLTP vs OLAP.pdf
new file mode 100644
index 00000000..eec0f776
Binary files /dev/null and b/Data Mining/OLTP vs OLAP.pdf differ
diff --git a/Data Mining/What Is Data Warehousing.pdf b/Data Mining/What Is Data Warehousing.pdf
new file mode 100644
index 00000000..584664e5
Binary files /dev/null and b/Data Mining/What Is Data Warehousing.pdf differ
diff --git a/Data Mining/What is Dimensional Model.pdf b/Data Mining/What is Dimensional Model.pdf
new file mode 100644
index 00000000..8840c9e3
Binary files /dev/null and b/Data Mining/What is Dimensional Model.pdf differ
diff --git a/Data Mining/What is OLAP.pdf b/Data Mining/What is OLAP.pdf
new file mode 100644
index 00000000..ab2b647e
Binary files /dev/null and b/Data Mining/What is OLAP.pdf differ
diff --git a/Data Science/Cheat Sheets for AI, Neural Networks, Machine Learning, Deep Learning & Big Data.pdf b/Data Science/Cheat Sheets for AI, Neural Networks, Machine Learning, Deep Learning & Big Data.pdf
new file mode 100644
index 00000000..0f09de2f
Binary files /dev/null and b/Data Science/Cheat Sheets for AI, Neural Networks, Machine Learning, Deep Learning & Big Data.pdf differ
diff --git a/Data Science/Data Science Cheat Sheet(Python&R).pdf b/Data Science/Data Science Cheat Sheet(Python&R).pdf
new file mode 100644
index 00000000..c7714f46
Binary files /dev/null and b/Data Science/Data Science Cheat Sheet(Python&R).pdf differ
diff --git a/Data Science/PythonForDataScience.pdf b/Data Science/PythonForDataScience.pdf
new file mode 100644
index 00000000..064f85b8
Binary files /dev/null and b/Data Science/PythonForDataScience.pdf differ
diff --git a/Data Visualization/Graphics.pdf b/Data Visualization/Graphics.pdf
new file mode 100644
index 00000000..0ac1d01f
Binary files /dev/null and b/Data Visualization/Graphics.pdf differ
diff --git a/Data Visualization/ggplot2.pdf b/Data Visualization/ggplot2.pdf
new file mode 100644
index 00000000..ff4b4bb1
Binary files /dev/null and b/Data Visualization/ggplot2.pdf differ
diff --git a/Data Visualization/plotly.pdf b/Data Visualization/plotly.pdf
new file mode 100644
index 00000000..d9f5fca3
Binary files /dev/null and b/Data Visualization/plotly.pdf differ
diff --git a/Data Warehouse/Data Warehouse Concepts.pdf b/Data Warehouse/Data Warehouse Concepts.pdf
new file mode 100644
index 00000000..f4a34e75
Binary files /dev/null and b/Data Warehouse/Data Warehouse Concepts.pdf differ
diff --git a/DevOps/DevOps.pdf b/DevOps/DevOps.pdf
new file mode 100644
index 00000000..abd87eef
Binary files /dev/null and b/DevOps/DevOps.pdf differ
diff --git a/Docker & Kubernetes/Docker Cheat Sheet.pdf b/Docker & Kubernetes/Docker Cheat Sheet.pdf
new file mode 100644
index 00000000..0816a61e
Binary files /dev/null and b/Docker & Kubernetes/Docker Cheat Sheet.pdf differ
diff --git a/Docker & Kubernetes/kubernetes.pdf b/Docker & Kubernetes/kubernetes.pdf
new file mode 100644
index 00000000..a6e95ad1
Binary files /dev/null and b/Docker & Kubernetes/kubernetes.pdf differ
diff --git a/Interview Questions/Data Science Interview Questions.pdf b/Interview Questions/Data Science Interview Questions.pdf
new file mode 100644
index 00000000..0ab58cda
Binary files /dev/null and b/Interview Questions/Data Science Interview Questions.pdf differ
diff --git a/Interview Questions/Getting Your First Job in DS.pdf b/Interview Questions/Getting Your First Job in DS.pdf
new file mode 100644
index 00000000..0323711b
Binary files /dev/null and b/Interview Questions/Getting Your First Job in DS.pdf differ
diff --git a/Interview Questions/ML Questions.pdf b/Interview Questions/ML Questions.pdf
new file mode 100644
index 00000000..c8deda4d
Binary files /dev/null and b/Interview Questions/ML Questions.pdf differ
diff --git a/Linux/Linux.png b/Linux/Linux.png
new file mode 100644
index 00000000..c9fa8ae1
Binary files /dev/null and b/Linux/Linux.png differ
diff --git a/Machine Learning/INTRODUCTION TO MACHINE LEARNING.pdf b/Machine Learning/INTRODUCTION TO MACHINE LEARNING.pdf
new file mode 100644
index 00000000..240e7dd0
Binary files /dev/null and b/Machine Learning/INTRODUCTION TO MACHINE LEARNING.pdf differ
diff --git a/Machine Learning/Linear Discriminant Analysis.pdf b/Machine Learning/Linear Discriminant Analysis.pdf
new file mode 100644
index 00000000..dd7cf4eb
Binary files /dev/null and b/Machine Learning/Linear Discriminant Analysis.pdf differ
diff --git a/Machine Learning/ML Formulas.pdf b/Machine Learning/ML Formulas.pdf
new file mode 100644
index 00000000..251a5969
Binary files /dev/null and b/Machine Learning/ML Formulas.pdf differ
diff --git a/Machine Learning/ML PROS N CONS.pdf b/Machine Learning/ML PROS N CONS.pdf
new file mode 100644
index 00000000..6224b267
Binary files /dev/null and b/Machine Learning/ML PROS N CONS.pdf differ
diff --git a/Machine Learning/ML-02-linear-regression.pdf b/Machine Learning/ML-02-linear-regression.pdf
new file mode 100644
index 00000000..76878038
Binary files /dev/null and b/Machine Learning/ML-02-linear-regression.pdf differ
diff --git a/Machine Learning/Machine Learning Cheatsheet.pdf b/Machine Learning/Machine Learning Cheatsheet.pdf
new file mode 100644
index 00000000..b347d4d6
Binary files /dev/null and b/Machine Learning/Machine Learning Cheatsheet.pdf differ
diff --git a/Machine Learning/Machine Learning Cheatsheet_NEW.pdf b/Machine Learning/Machine Learning Cheatsheet_NEW.pdf
new file mode 100644
index 00000000..b347d4d6
Binary files /dev/null and b/Machine Learning/Machine Learning Cheatsheet_NEW.pdf differ
diff --git a/Machine Learning/Pytorch.pdf b/Machine Learning/Pytorch.pdf
new file mode 100644
index 00000000..5f8a37d0
Binary files /dev/null and b/Machine Learning/Pytorch.pdf differ
diff --git a/Machine Learning/Supervised Machine Learning.pdf b/Machine Learning/Supervised Machine Learning.pdf
new file mode 100644
index 00000000..366ca2b6
Binary files /dev/null and b/Machine Learning/Supervised Machine Learning.pdf differ
diff --git a/Mathematics/Algebra_Cheat_Sheet.pdf b/Mathematics/Algebra_Cheat_Sheet.pdf
new file mode 100644
index 00000000..2c73afdc
Binary files /dev/null and b/Mathematics/Algebra_Cheat_Sheet.pdf differ
diff --git a/Mathematics/LinearAlgebra.pdf b/Mathematics/LinearAlgebra.pdf
new file mode 100644
index 00000000..f2f77a33
Binary files /dev/null and b/Mathematics/LinearAlgebra.pdf differ
diff --git a/Mathematics/all_in_one_cheat_sheet_v2.6_web.pdf b/Mathematics/all_in_one_cheat_sheet_v2.6_web.pdf
new file mode 100644
index 00000000..f59714cf
Binary files /dev/null and b/Mathematics/all_in_one_cheat_sheet_v2.6_web.pdf differ
diff --git a/Matlab/matlab_guide.pdf b/Matlab/matlab_guide.pdf
new file mode 100644
index 00000000..3578e2a8
Binary files /dev/null and b/Matlab/matlab_guide.pdf differ
diff --git a/Probability and Statistics/cheatsheet-probability.pdf b/Probability/cheatsheet-probability.pdf
similarity index 100%
rename from Probability and Statistics/cheatsheet-probability.pdf
rename to Probability/cheatsheet-probability.pdf
diff --git a/Probability and Statistics/probability_cheatsheet.pdf b/Probability/probability_cheatsheet.pdf
similarity index 100%
rename from Probability and Statistics/probability_cheatsheet.pdf
rename to Probability/probability_cheatsheet.pdf
diff --git a/Python/100_numpy_exercises.pdf b/Python/100_numpy_exercises.pdf
new file mode 100644
index 00000000..ff95006e
Binary files /dev/null and b/Python/100_numpy_exercises.pdf differ
diff --git a/Python/Python for Data Analysis.pdf b/Python/Python for Data Analysis.pdf
new file mode 100644
index 00000000..5f0bab5a
Binary files /dev/null and b/Python/Python for Data Analysis.pdf differ
diff --git a/Python/PythonForDataScience.pdf b/Python/PythonForDataScience.pdf
new file mode 100644
index 00000000..f515b821
Binary files /dev/null and b/Python/PythonForDataScience.pdf differ
diff --git a/Python/Python_cheatsheet.pdf b/Python/Python_cheatsheet.pdf
new file mode 100644
index 00000000..01240a59
Binary files /dev/null and b/Python/Python_cheatsheet.pdf differ
diff --git a/Python/Reading and Writing data with PANDAS.pdf b/Python/Reading and Writing data with PANDAS.pdf
new file mode 100644
index 00000000..53ea33f3
Binary files /dev/null and b/Python/Reading and Writing data with PANDAS.pdf differ
diff --git a/Python/pandas-10min.pdf b/Python/pandas-10min.pdf
new file mode 100644
index 00000000..79aba6dd
Binary files /dev/null and b/Python/pandas-10min.pdf differ
diff --git a/Python/pandas_cheat_sheet.pdf b/Python/pandas_cheat_sheet.pdf
new file mode 100644
index 00000000..806eb0d3
Binary files /dev/null and b/Python/pandas_cheat_sheet.pdf differ
diff --git a/Python/python-cheatsheets-ds.pdf b/Python/python-cheatsheets-ds.pdf
new file mode 100644
index 00000000..45beb2bc
Binary files /dev/null and b/Python/python-cheatsheets-ds.pdf differ
diff --git a/Python/spaCy.pdf b/Python/spaCy.pdf
new file mode 100644
index 00000000..159baedf
Binary files /dev/null and b/Python/spaCy.pdf differ
diff --git a/R Cheat Sheet/R Programming Cheat Sheet.pdf b/R Cheat Sheet/R Programming Cheat Sheet.pdf
new file mode 100644
index 00000000..d968e6f4
Binary files /dev/null and b/R Cheat Sheet/R Programming Cheat Sheet.pdf differ
diff --git a/R Cheat Sheet/basicR.pdf b/R Cheat Sheet/basicR.pdf
new file mode 100644
index 00000000..7133dd0d
Binary files /dev/null and b/R Cheat Sheet/basicR.pdf differ
diff --git a/README.md b/README.md
index a6d16780..385a0b05 100644
--- a/README.md
+++ b/README.md
@@ -1 +1 @@
-# Data Science (Cheat Sheet)
+# Data Science (Cheat Sheets)
diff --git a/SQL/SQL for DS.pdf b/SQL/SQL for DS.pdf
new file mode 100644
index 00000000..aa900c46
Binary files /dev/null and b/SQL/SQL for DS.pdf differ
diff --git a/SQL/SQL-cheat-sheet.pdf b/SQL/SQL-cheat-sheet.pdf
new file mode 100644
index 00000000..c55ac2a0
Binary files /dev/null and b/SQL/SQL-cheat-sheet.pdf differ
diff --git a/Scala/scala-quick-reference.pdf b/Scala/scala-quick-reference.pdf
new file mode 100644
index 00000000..c3b25a4f
Binary files /dev/null and b/Scala/scala-quick-reference.pdf differ
diff --git a/Statistics/Statistics Cheat Sheet.pdf b/Statistics/Statistics Cheat Sheet.pdf
new file mode 100644
index 00000000..26ae9d14
Binary files /dev/null and b/Statistics/Statistics Cheat Sheet.pdf differ
diff --git a/Probability and Statistics/cheatsheet-statistics.pdf b/Statistics/cheatsheet-statistics.pdf
similarity index 100%
rename from Probability and Statistics/cheatsheet-statistics.pdf
rename to Statistics/cheatsheet-statistics.pdf