1. What HIS (Health Information System)?
Health Information Systems are digital systems with open data that comes from different sources and that is ethically used, through effective ICT tools, to generate strategic information for the benefit of public health. According to the World Health Organization, Health Information Systems may be used to generate information that can enable decision-makers at all levels of the health system to identify problems and needs, make evidence-based decisions on health policy, and allocate scarce resources optimally.

2. What is a progressive web app?
A progressive web app (PWA) is an app that’s built using web platform technologies, but that provides a user experience like that of a platform-specific app.

Sources:
https://www.paho.org/en/topics/health-information-systems

https://developer.mozilla.org/en-US/docs/Web/Progressive_web_apps/Guides/What_is_a_progressive_web_app