Introduction Date: May 16, 1994
Discontinued Date: June 10, 1995
Original Mac OS: 7.1.1*
Supported Mac OS: 7.1.1-8.1
Apple Order/Model: M2597LL/A*
Model Family: M4880
Processor Speed: 25 MHz*
Processor Type: 68LC040
Standard RAM: 4 MB, 12 MB
Maximum RAM: 36 MB*
Processor Upgrade: Third-Party*
FPU: None
System Bus Speed: 25 MHz
Cache Bus Speed: N/A
ROM Type: Macintosh ROM
ROM Size: 2 MB
L1 Cache: 8k
L2 Cache: N/A
RAM Type: DRAM Card*
Min. RAM Speed: 70 ns
Motherboard RAM: 4 MB
RAM Slots: 1*
Video Card: Dedicated*
VRAM Type: Onboard
Standard VRAM: 512k*
Maximum VRAM: 512k*
Built-in Display: 9.5" Grayscale
Native Resolution: 640x480
2nd Display Support: Dual/Mirroring*
2nd Max. Resolution: 832x624*
Standard Hard Drive: 160 MB, 240 MB*
Int. HD Interface: SCSI
Standard Optical: None

Standard Disk: 1.44 MB (Manual)
Standard Modem: 14.4k (Optional)
Standard Ethernet: AAUI-15
Expansion Slots: 2 Type II PC Card*
Expansion Bays: 1**
Case Type: Notebook
Form Factor: PowerBook 520
Apple Subfamily: PowerBook 520/520c
Gestalt ID: 72
Battery Type: NiMH
Battery Life: 3-4 Hours*
Dimensions: 2.3 x 11.5 x 9.7
Avg. Weight: 6.3 lbs (2.9 kg)
Original Price (US): US$2250, US$2400
Est. Current Retail: N/A*
Video (Monitor): 1 (Mini-15)
Floppy (Ext.): None
ADB: 1
SCSI: 1 (HDI-30)
Serial (Standard): 1
Serial (Geoport): None
Modem: None*
Ethernet: 1 (AAUI-15)
S-Video Input: None
S-Video Output: None
Microphone: 1 (Line Level)
Sound In: None
Sound Out: 1 (16-Bit Stereo)
Headphone: None
Security (Lock): 1
Joystick (PC): None
Power: N/A
Power Adapter: 1