Infographic titled "Software Maintenance Types" by Niotechone Software Solution, showing four interconnected circles numbered 01 to 04: Corrective Maintenance, Adaptive Maintenance, Perfective Maintenance, and Preventive Maintenance.

An educational graphic outlining the different stages of software upkeep. It categorizes maintenance into four types: 01 Corrective (fixing bugs), 02 Adaptive (updating for new environments), 03 Perfective (improving performance), and 04 Preventive (preventing future issues).