The interface supports and provides Zend Tool interface giving a whole host of command functionalities. It is proposed as an extension of SDN paradigm to incorporate mobile network specific functionalities. Also, the ability to implement new or improved functionalities (e.g. mechanical flexibility) plays a role. Many different functionalities can be implemented in VCA. Novel functionalities or protein specificity can also be engineered using computational approaches. A CMMS offers multiple core maintenance functionalities. Oftentimes commercial vendors provide different combinations of these functionalities which tend to improve SIEM overall. Furthermore, Action Helpers are also a way to provide extra functionalities within the framework. ONTAP OS contains a number of storage efficiencies, which are based on WAFL functionalities. All the main functionalities work both online and offline. Mailing lists preceded web forums and can provide similar functionalities. Niconico.com later introduced video upload and (for Premium users) live streaming functionalities. CCS defines a standard set of functionalities for controlling image sensors using CSI-2. NLTK supports classification, tokenization, stemming, tagging, parsing, and semantic reasoning functionalities. These versions also make use of Steam's cloud saving and achievement functionalities and leaderboards.