When it comes to custom-made, high-tech home building, prefabricated home systems can be a boon.

FORBES: Amazing High-Tech Homes

Colas notes that Apple is hardly the only tech heavyweight building up a considerable cash balance.

FORBES: With Tim Cook Set To Speak, Apple's Cash Collection In Focus

On the call, Mr. Einhorn also criticized the broader practice of tech companies building large cash reserves to protect themselves against unexpected downturns, or to fund possible acquisitions.

WSJ: Judge Grants David Einhorn's Bid To Block Apple Proxy Vote