Advertising services, namely, direct media advertising and promoting the goods and services of others with customized video via addressable video delivery networks, namely cable systems, satellite broadcasts, streaming video and internet; and preparing advertisements for others, namely, preparing, and assembling audio-visual advertising displays

installation and maintenance services for PBX's and peripheral equipment for PABX's such as voice messaging equipment, call accounting equipment, computer and telephone integration equipment, and software for the aforementioned