Providing applications for computers, tablet PCs and smartphones for monitoring programmable logic controllers, editing programs and data in programmable logic controllers and for uploading and downloading programs and data of programmable logic controllers; Software as a service (SAAS) services for smartphones and personal digital assistants for use in monitoring, editing data in programmable logic controllers and uploading, downloading programs of programmable logic controllers; Providing temporary use of online non-downloadable software for smartphones and personal digital assistants for use in monitoring, editing data in programmable logic controllers and uploading, downloading programs of programmable logic controllers; Providing temporary use of web-based applications for smartphones and personal digital assistants for use in monitoring, editing data in programmable logic controllers and uploading, downloading programs of programmable logic controllers