diff --git a/content/roadmaps/101-backend/content/114-design-and-development-principles/103-solid.md b/content/roadmaps/101-backend/content/114-design-and-development-principles/103-solid.md
index 7d6790eb1..93341b0d8 100644
--- a/content/roadmaps/101-backend/content/114-design-and-development-principles/103-solid.md
+++ b/content/roadmaps/101-backend/content/114-design-and-development-principles/103-solid.md
@@ -1 +1,15 @@
-# Solid
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+# SOLID
+
+SOLID is a set of principles applied to object-oriented design (OOD) to create maintainable, understandable, and flexible code, while avoiding code smells and defects. The principles are:
+
+- Single Responsibility
+- Open/Closed
+- Liskov Substitution
+- Interface Segregation
+- Dependency Inversion
+
+Free Content
+Design Principles and
+Design Patterns
+SOLID Principles
+SOLID: The First 5 Principles of Object Oriented Design
diff --git a/content/roadmaps/101-backend/content/116-search-engines/100-elasticsearch.md b/content/roadmaps/101-backend/content/116-search-engines/100-elasticsearch.md
index 1c01a877a..882db2bc2 100644
--- a/content/roadmaps/101-backend/content/116-search-engines/100-elasticsearch.md
+++ b/content/roadmaps/101-backend/content/116-search-engines/100-elasticsearch.md
@@ -1 +1,10 @@
-# Elasticsearch
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+# Elasticsearch
+
+Elastic search at its core is a document-oriented search engine. It is a document based database that lets you INSERT, DELETE , RETRIEVE and even perform analytics on the saved records. But, Elastic Search is unlike any other general purpose database you have worked with, in the past. It's essentially a search engine and offers an arsenal of features you can use to retrieve the data stored in it, as per your search criteria. And that too, at lightning speeds.
+
+Free Content
+
+Elasticsearch Website
+Elasticsearch Documentation
+
+