Introduction Currently, many businesses are incorporating various information systems (IS) into their processes, relying on computers to not just store but analyze and systematize data. In a startup, using a number of IS can help the managers and executives to see data related to external relations (other businesses and customers) and internal activities (accounting, marketing, and more). The startup under exploration is an event planning business for small and medium-sized companies and individuals. Thus, this small company needs to search for and communicate with customers, have several other companies in the supply chain, and store a significant amount of data. Types and Functions of Information Systems The described startup can benefit from several IS, and more can be added in the future. At present, the business uses several functional area IS for accounting, marketing, and human resources (HR). First, the functional area IS is useful for helping employees and managers to collect, store, and analyze data related to internal company activities. An accounting IS’s function is to choose the best funding sources, perform audits, and forecast future revenues (Ferdiana & Sulistyo, 2019). Marketing IS can help determine how the startup should advertise itself and which goods will gain the most popularity among clients. Third, the IS for HR manages recruitment and employees’ performance and productivity (Rainer & Prince, 2019). Thus, these systems simplify the process of monitoring the main events that would otherwise be recorded and analyzed on paper.r Apart from that, the startup utilizes a transaction processing system. The former is necessary for transactions that happen between the business and clients or suppliers. As the event planning business requires the company to purchase products from other companies, all purchases are recorded as transactions. Similarly, when clients purchase any services, the transaction processing system recognizes this as a change in the company’s accounts (Rainer & Prince, 2019). In this way, this particular IS also supports the accounting system and provides an insightful look into the company’s financial operations. Integration in the Business The information from each of these systems allows the business to optimize and save time on analyzing data. For example, the integration of a marketing IS decreases the difficulty of choosing the best marketing channels for the startup – the managers can rely on the collected information and see which media are the most popular among the chosen client group (Rainer & Prince, 2019). In accounting, the IS helps the appointed manager to create detailed forecasts with minimal effort. Moreover, an HR system documents the deals that employees close, their responses to customers, problem-solving measures, and other details of the performance. At the same time, the transaction processing system records all purchases and sales, which helps to create reports and determine the relationship with suppliers and clients in real-time. Competitive Advantage The main competitive advantage of IS is the ability to optimize every part of the business. As various IS perform data collection and help people to perform analyses, they shorten the time workers need to complete these tasks. As a result, they can concentrate on establishing a stron