This document explores software-driven technology efficiency as a key enabler for IT sustainability. It begins with an introduction to sustainable IT practices, followed by strategies for efficient software development that reduce resource consumption and environmental impact. A critical section focuses on evaluating existing applications using the 6R’s framework—Retain, Rehost, Replatform, Refactor, Rearchitect, and Replace—to optimize application portfolios for sustainability and performance. Together, these approaches help organizations minimize their carbon footprint while enhancing operational efficiency and innovation, as per HPE Greenlake.

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