Software as a service (SaaS) provider in the field of software for document management, namely, file encryption in portable document format (PDF), digital signature management, digital document annotation and optical character recognition; software as a service (SaaS) provider in the field of software for manipulating and converting digital files and images in a portable document format (PDF); providing temporary use of online non-downloadable middleware [software] for providing an interface between portable document format (PDF) and other file formats; providing the ability to digitally sign and send a document in portable document format (PDF) for signature, namely, implementation of software for authenticating digital signatures; design and development of computer software; computer development services relating to the provision of white label software technology to third-parties in the field of portable document format (PDF) solutions