olemus
aegunud tarkvara, mis on kasutusel
hoolimata uuemate alternatiivide olemasolust

ülevaateid
http://ravii.staff.gunadarma.ac.id/Downloads/files/35441/legacy-system.pdf

http://people.rajagiritech.ac.in/sites/default/files/vijuprakash/files/lecture-2_0.pdf

https://www.canadianlawyermag.com/news/opinion/time-to-say-goodbye-dealing-with-legacy-software/274988

http://se.inf.ethz.ch/old/teaching/2008-S/se-0204/slides/21-Legacy-Software.pdf

https://arxiv.org/pdf/2004.10724.pdf

https://gaudisite.nl/INCOSE2018_Moraga_Yang_LegacySoftware.pdf

vt ka
- pahavara
- pärandsüsteem