Context: The Macintosh's minimal memory became apparent, even compared with other personal computers in 1984, and could not be expanded easily. It also lacked a hard disk drive or the means to easily attach one. Many small companies sprang up to address the memory issue. Suggestions revolved around either upgrading the memory to 512 KB or removing the computer's 16 memory chips and replacing them with larger-capacity chips, a tedious and difficult operation. In October 1984, Apple introduced the Macintosh 512K, with quadruple the memory of the original, at a price of US$3,195. It also offered an upgrade for 128k Macs that involved replacing the logic board.

Question: What part of the Mac's could not be expanded easily in 1984?
Answer: memory

Question: What did Mac's lack in 1984 and have no means to easily attach?
Answer: a hard disk drive

Question: What did some small companies suggest Mac's 16 memory chips be replaced with?
Answer: larger-capacity chips

Question: How much more memory did Apple's Macintosh 512K, introduced in 1984, have than the original?
Answer: quadruple

Question: What was replaced in the upgrade that was offered for 128k Macs?
Answer: the logic board

Question: What part of the Mac's could not be expanded easily in 1994?
Answer: Unanswerable

Question: What did Mac's lack in 1994 and have no means to easily attach?
Answer: Unanswerable

Question: What did some small companies suggest Mac's 32 memory chips be replaced with?
Answer: Unanswerable

Question: How much more memory did Apple's Macintosh 512K, introduced in 1994, have than the original?
Answer: Unanswerable

Question: What was replaced in the upgrade that was offered for 256k Macs?
Answer: Unanswerable