The Powerbook G3 was Apple's professional line of laptops between 1997 and 2000 and, perhaps unsurprisingly, was powered by the PowerPC G3 processor.
G3s make a couple of appearances. Mary uses her laptop to research the progress of the radiation and to communicate with Peter. A solar-powered G3 in an Anchorage newsroom raises the hopes of the submarine's crew with its garbled transmissions.
Thar solar panel is pretty tiny.
Zac's father uses a Powerbook to do his research,
Single-Pamela has a Powerbook G3 at home, which she presumably uses to write her articles.
Russel has the Powerbook with him on a business trip.
Larry uses his Powerbook to research the history of the museum's exhibits in the hope of controlling them that night.
Nick uses a Powerbook in his office, writing an abortive attempt at a letter to Darcy.
Alex uses his Powerbook G3 to write his novels.
The destruction of Alex's laptop causes him to lose his job.
Matt has a Powerbook G3 on which he keeps pictures and video of Nicole, his ex.
One of Milo's friends at the start-up, Skullbocks, used his Powerbook G3 to monitor their web site's performance and to view a video news feed.
It looks like the G3 is running Linux.
Carrie has a Powerbook G3 on which all her work is stored. The machine crashes and in desperation she takes it to a computer repair shop in the hope of getting her files back.
The FAA offices seem to be littered with Powerbook G3s.
Whilst being chased through a hotel by the police, Liu passes through a room where a hotel guest is using a Powerbook G3 in bed.
Stephen Price, the millionaire asmusement park owner, writes a guest list for the party on his Powerbook, which subsequently mysteriously changes to a list of seemingly random people.
Karen, mother of the abducted child, desperately tries to communicate with her husband using the family's Powerbook, but the kidnappers have severed its internet connection.
Many of the bank's employees have Powerbooks, as does one of Kevin's friends who tries to retrieve vital data from a disk using it.
Chuck Cedar has a Powerbook G3 that lies unused on his desk.
Prominent sports reporter Jack Rose uses a Powerbook G3 whilst reporting on the games.
Muriel's laptop is a Powerbook G3.
Amelia and Bill use software on the G3 to make their faces look exactly like Muriel's, or later of an animated toy rabbit.
Ethan is briefed about the mission using a Powerbook, and later an unscrupulous businessman does a deal with Ambrose, transferring shares with a similar laptop.
After putting on an arm band Major Carter starts writing a complex book at great speed on her Powerbook.
Carmella tries to persuade Joan, her neighbour's sister, to write Meadow a letter of recommendation. Joan uses a Powerbook G3.
Mia has a Powerbook G3 in her room.
Ruby, one of Rosetta's SRAs has a boyfriend with a Powerbook. Also the doctors investigating the virus have a similar machine.
Computer hacker Finch is hired to prevent knowledge of the impending disaster from getting out and causing public panic. He does this, and later leaks the story after the success of the mission to the Earth's core using his Powerbook G3.