JSIKTI: Journal of Information Systems and Applied Computer Technology Indonesia, Volume 3 Number 4 (June 2021) presents a collection of applied information system studies contributed by STMIK STIKOM Indonesia, Universitas Respati Yogyakarta, and Universitas Mahendradatta. This issue highlights innovations in mobile information systems, geographic information systems (GIS), cooperative financial systems, and decision support models applied across industry, agriculture, and organizational management.

The articles include the development of a mobile-based raw material calculation system for PT. Sari Burger Indonesia, a GIS-based irrigation data inventory system to support water distribution in Sleman Regency, and a web-based savings and financial information system for cooperatives. Further contributions examine a decision support system using the Profile Matching method for job promotion evaluation, as well as the development of geographic information technology as a medium for biodiversity exploration and visualization in Indonesia.

This issue demonstrates the collaborative commitment of the contributing institutions to advancing practical, technology-driven solutions across multiple sectors. Through system development, GIS integration, and intelligent decision-support techniques, the volume reinforces JSIKTI’s role in supporting digital transformation and applied research within Indonesia’s academic and professional communities.