The original iPad announcement was outlined in a January 27, 2010, press release issued by Apple. The iPad was described as, “a revolutionary device for browsing the web, reading and sending email, enjoying photos, watching videos, listening to music, playing games, reading e-books and much more.” Steve Jobs said it was, “a magical and revolutionary device…[that] defines an entirely new category of devices that will connect users with their apps and content in a much more intimate, intuitive and fun way than ever before.”
The original iPad used a 9.7-inch multitouch display (1024×768 at 132 ppi). It ran the same operating system as iPhone, which at the time was referred to as iPhone OS 3.2 (the name “iOS” would not be used until June 2010).
Internally, the original iPad had a 1 GHz Apple A4 processor; 16, 32, or 64 GB of storage; 802.11a/b/g/n Wi-Fi; an accelerometer; an ambient light sensor; a digital compass; GPS; two mono speakers; and a built-in microphone. The iPad was 0.5 inches thick and weighed 1.6 pounds.
Sources: EveryMac.com, Apple.com, Wikipedia.com