Recording on cassette tapes was carried out linearly, which created it very hard to look for recorded proof because it was important to "operate the tape" until reaching the point of interest exactly where the function was recorded. Other developments involve the increasing prevalence of CCTV in non-public properties. https://cctv-installation-in-wake39257.tokka-blog.com/36775737/detailed-notes-on-cctv-installation-in-wakefield