I think in this context bullying can be expanded to its summative affect at the level of the society. This accumlative persecution is cultural and does in turn lesd to internal beliefs that one’s perceived deviance, as pushed by the dominant social narrative, is unworthy. There are studies that demonstrate societal pressures/persecution does lead to increased rates of suicide. This is most notable within marginalized groups supporting the point made above.
Perhaps it’s just a leftover marketing motif?
"The spelling disk and disc are used interchangeably except where trademarks preclude one usage, e.g., the Compact Disc logo. The choice of a particular form is frequently historical, as in IBM’s usage of the disk form beginning in 1956 with the “IBM 350 disk storage unit”. "
https://en.m.wikipedia.org/wiki/Disk_storage