42 Design, development, installation, maintenance and updating of educational software, mathematical software, science software, computer software for use in the fields of chemistry and biology, computer software for mathematical notation and computer software for word processing; software as a service (SaaS) featuring software for educational instruction and technical writing in the science, technology, engineering and mathematics (STEM) field; software as a service (SaaS) featuring computer software for mathematical notation and word processing; providing temporary use of non-downloadable software for educational instruction and technical writing in the science, technology, engineering and mathematics (STEM) field; providing temporary use of non-downloadable computer software for mathematical notation and word processing; platform as a service (PaaS) featuring computer software platforms for educational instruction and technical writing in the science, technology, engineering and mathematics (STEM) field; platform as a service (PaaS) featuring computer software platforms for mathematical notation and word processing; computer services, namely, creating an on-line community for registered users to participate in discussions, get feedback from their peers, form virtual communities, and engage in social networking services in the field of mathematics; design, development, installation, maintenance and updating of software development kits (SDK)