OOD

List of others OODs collected by @goCoronaGo

• Library Management System

• Parking Lot

• Amazon (Online Shopping System)

• Stack Overflow

• Movie Ticket Booking System (BookMyShow)

• ATM

• Airline Management System

• Blackjack and a Deck of Cards

• Hotel Management System

• Restaurant Management System

• Chess

• Online Stock Brokerage System

• Linkedin

• Crickinfo (Sports Website)

• Facebook (Social Network)

• Cab Booking (Uber)

• Chatting

• Calendar

• Blog Site

• Food Delivery

Another list from @242jainabhi:

• Vending Machine

• Traffic Lights

• Elevator

• Meeting Scheduler

• Car Rental