I want to design specific class hierarchy consisting of three classes: Certificate, Organization, User. Both Certificate and Organization seem to me to be kinda
dropout
mathematical-lattices
flanneld
certifi
payment-services
digital-filter
bellman-ford
angular-language-service
popsql
coccinelle
dtd-parsing
matpower
strstr
securepay
weak-references
diarization
sumup-payments
progress
microblaze
repository-design
windows-8
tailwind-css
avplayerlooper
restart
staggered-gridview
cedet
spring-gem
emacsclient
lego
getpass