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Software services in the form of providing online non-downloadable progressive web applications (PWAs) featuring technology to allow users to perform electronic business transactions; providing online non-downloadable software in the form of progressive web applications (PWAs) for use in retail transactions; software services in the form of providing progressive web applications (PWAs) for mobile and electronic devices for use in the retail industry, namely, providing online non-downloadable software for point of sale transactions; developing progressive web application software for others for the retail industry