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2. Macintosh 512K - Wikipedia

   en.wikipedia.org/wiki/Macintosh_512K

   The Macintosh 512K is a personal computer that was designed, manufactured and sold by Apple Computer from September 1984 to April 1986. It is the first update to the original Macintosh 128K . It was virtually identical to the previous Macintosh , differing primarily in the amount of built-in random-access memory .

3. Macintosh 128K/512K technical details - Wikipedia

   en.wikipedia.org/wiki/Macintosh_128K/512K...

   Protected memory was only added to Macintosh computers with the release of the Mac OS X operating system. According to Andy Hertzfeld, the Macintosh used for the introduction demo on January 24, 1984, was a prototype with 512k RAM, even though the first model offered for sale implemented just 128k of non-expandable memory. This prototype was ...

4. Macintosh 512Ke - Wikipedia

   en.wikipedia.org/wiki/Macintosh_512Ke

   Because Apple's official upgrades were costly, many third-party manufacturers offered add-on SCSI cards, as well as RAM upgrades, to achieve the same functionality. The new ROM allowed the computer to run much newer system and application software; though it loaded more data into RAM, it only slightly decreased the amount of available memory ...

5. HP 49/50 series - Wikipedia

   en.wikipedia.org/wiki/HP_49/50_series

   The hp 48gII (F2226A), which was announced on 20 October 2003, was not a replacement for the HP 48 series as its name suggested. Rather it was a 49g+, also with an ARM processor (unlike the HP 48G), but with reduced memory, no expansion via an SD memory card, lower clock speed, a smaller screen, and a non-flashable firmware. This calculator ...

6. Apple's 512GB Mac mini is back at its lowest price ever - AOL

   www.aol.com/apples-512gb-mac-mini-back-155047585...

   Save $149: The big savings are back for this little computer. For a limited time, the 512GB Mac mini is just $749.99 at Amazon — a 17% markdown — thanks to a $100 discount and $49 coupon ...

7. Macintosh 128K - Wikipedia

   en.wikipedia.org/wiki/Macintosh_128K

   Although this had always been planned from the beginning, Steve Jobs maintained if the user desired more RAM than the Mac 128 provided, he should simply pay extra money for a Mac 512 rather than upgrade the computer himself. When the Mac 512 was released, Apple rebranded the original model as "Macintosh 128k" and modified the motherboard to ...