olemus
aegunud tarkvara, mis on kasutusel
hoolimata uuemate alternatiivide olemasolust
=
any piece of software that can't receive continued updates or support from its developer, or can't meet the compliance standards in use

ülevaateid
https://heimdalsecurity.com/blog/what-is-legacy-software-system-risks/

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

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

https://gaudisite.nl/INCOSE2018_Moraga_Yang_LegacySoftware.pdf

vt ka
- pahavara
- pärandsüsteem