This document outlines the patient queue and notification system for Dr. Shreenath's clinic. It shows the process of patients checking in online or at the clinic, being assigned a token number and place in queue, and receiving notifications about their upcoming appointment. Key events summarized are: 1) Patients register online or arrive at the clinic and are added to the queue with a token number. 2) The first 5 patients in queue receive a notification when the doctor arrives. 3) Patients are marked as present when they enter the examination room, or absent if they do not arrive. 4) Those further down the queue receive updated notifications about their new place as patients ahead of them are seen.