Reviewing job listings from the company can reveal the technology stack used by an organization, including software, hardware, and security practices, which is crucial for identifying potential vulnerabilities. Job listings often mention the specific skills, technologies, and platforms for which they are hiring, thus inadvertently providing insights into the company's internal technology environment. DNS lookups can provide information about subdomains and IP addresses but are less likely to provide specifics about the technology stack. Analyzing website archives can reveal historical data but does not necessarily disclose current technologies in use or specific security vulnerabilities. Identifying cryptographic flaws is important, but does not directly indicate the overall technology stack the company utilizes.