Claim: Linux is free and open-source software.
Evidence: oggˈlɪnəks -RSB- or , less frequently , -LSB- ˈlaɪnəks -RSB- -RRB- is a Unix-like computer operating system assembled under the model of free and open-source software development and distribution.
Free and open-source software -LRB- FOSS -RRB- is computer software that can be classified as both free software and open-source software.