Software
by Lauren Halstead
1. System softwares
1.1. Problem 1
1.2. Problem 2
2. Types
2.1. open-source
2.2. Idea 3
2.2.1. New node
2.2.2. New node
2.2.2.1. New node
2.2.2.1.1. New node
2.2.1. New node
2.2.2. New node
2.2.2.1. New node
2.2.2.1.1. New node