make an ERD diagram

Our regional Users Group has grown to include over 200 members. We are an all volunteer organization and our records are a mess. We need an information system to help us keep track of all our affairs. We definitely need to automate our membership records. For each member, we need to keep the members name, title, mailing address, office phone number, type of membership (individual or corporate), and whether or not the member has paid their dues. We collect dues on a yearly basis in January. We also like to know which company a member works for, but keeping this information current is a real chore, because our members are always changing companies. We only try to track a single current employer for each member. Our members come from many different companies, and a few are unemployed. For each company, we keep the company name, address, and type of business. We have a standard set of type of business codes. We only keep the main company address for each company. We hold various events during the year, and we would like to track information about each event. Some of our annual events include the September meeting and the November meeting, the annual training day in January and our April meeting. We also hold special events each year. We hold our events at several different locations around town. We would like to track each events date, sometimes a description of the event, the number of attendees, where it was held, how much money we spent on it, and any comments. We treat all comments as if they came from an anonymous person. We frequently get multiple sets of comments for an event. We track which members attended which events. Some of our members are really active, and others attend very infrequently or just enjoy receiving our newsletter. We also track what type of computer platforms our members are using. We have a unique three digit system identification tag for each type of platform. For example, 001 is for IBM/MVS, and 002 is for IBM/VM. We also like to track which application areas each member is interested in. For example, accounting, human resources, oil and gas and pharmaceuticals.