diff --git a/README.md b/README.md
index a070c09..8068fdb 100644
--- a/README.md
+++ b/README.md
@@ -49,10 +49,14 @@
## What is this list?
-This list is a collection of various materials that I use every day in my work. It contain a lot of useful information gathered in one piece. It is intended for everyone and anyone who is or wants to become a Ninja Admin (and not only).
+This list is a collection of various materials that I use every day in my work. It contain a lot of useful information gathered in one piece.
This is not a final and full version - I update it on an ongoing basis.
+## For whom?
+
+It is intended for everyone and anyone who is or wants to become a Ninja Admin (and not only) - for system and network administrators, for pentesters and security researches.
+
## :ballot_box_with_check: Todo
- [ ] Add useful shell functions
@@ -188,6 +192,7 @@ for transferring data with URLs.
:small_orange_diamond: tlsfun.de - registered for various tests regarding the TLS/SSL protocol.
:small_orange_diamond: Common CA Database - repository of information about CAs, and their root and intermediate certificates.
:small_orange_diamond: CERTSTREAM - real-time certificate transparency log update stream.
+ :small_orange_diamond: crt.sh - discovers certificates by continually monitoring all of the publicly known CT.
##### :black_small_square: HTTP Headers
@@ -230,6 +235,7 @@ for transferring data with URLs.
:small_orange_diamond: Shodan - the world's first search engine for Internet-connected devices.
:small_orange_diamond: Shodan 2000 - if you use Shodan for everyday work, be sure to see it - looks for randomly generated data from Shodan.
:small_orange_diamond: GreyNoise - mass scanner (such as Shodan and Censys).
+ :small_orange_diamond: ZoomEye - search engine for cyberspace that lets the user find specific network components.
:small_orange_diamond: Buckets by Grayhatwarfar - database with public search for Open Amazon S3 Buckets and their contents.
@@ -247,6 +253,7 @@ for transferring data with URLs.
:small_orange_diamond: XSS String Encoder - for generating XSS code to check your input validation filters against XSS.
:small_orange_diamond: RegExr - online tool to learn, build, & test Regular Expressions (RegEx / RegExp).
:small_orange_diamond: Hardenize - deploy the security standards.
+ :small_orange_diamond: VirusTotal - analyze suspicious files and URLs to detect types of malware.
##### :black_small_square: Code parsers/playgrounds