Goods, both tangibles and intangibles, may involve the transfer of product ownership to the consumer. The five attributes of this model are&colon; reliability, responsiveness, assurance, tangibles, and empathy. Lye was also an important kinetic sculptor and what he referred to as "Tangibles". Most of the tangibles are flat, with one fiducial on the underside. Audio frequency VCOs, LFOs, VCFs, and sequencers are some of the commonly used tangibles. There are various types of tangibles representing different modules of an analog synthesizer. Other tangibles vary between versions of the game.