FAQ.md

@@ -320,7 +320,7 @@ provided together with the executable file.
 
 The VECTO components are written in C## and delivered as executable files.
 
-## 2. What operating system is necessary to run VECTO?
+## 2. What operating system is needed to run VECTO?
 
 The VECTO tools are portable applications, i.e., it is not necessary to run a setup procedure for
 installation. The executable file can be run from any place on a computer or in a network