This document summarizes 5 myths about open source software:
1) Open source software is unsupported and unreliable, but the document shows that open source software like PostgreSQL/PostGIS can perform faster than proprietary software like Oracle 11g in benchmarks. Open source software also tends to have fewer bugs per line of code than proprietary software.
2) Big companies don't use open source software, but many big companies do use open source software and contribute to open source projects.
3) Open source software is free, but there are costs associated with certifications, integration, training, support, and online services for open source software.
4) Open source is unsustainable, but open source business models can be sustainable through