Pete's World

Pete's World was the Tenth Doctor's name for an alternate universe and home to its own Cybermen which John Lumic, the head of Cybus Industries, had created.

Overview
The Doctor derived the name from Pete Tyler, that universe's version of Rose Tyler's father, who in her universe had died in 1987. Time ran ahead in this universe, compared to the Doctor's universe, so that when it was 2007 in the Doctor's universe it was simultaneously three years later in Pete's World. (DW: Doomsday)

Pre-Cybermen

 * Great Britain had a President as head of state, instead of a monarch; he wasn't said to be president of Northern Ireland, so there may not have been a United Kingdom here. Army blockades and nightly curfews were in place for lower-income areas of London. (DW: Rise of the Cybermen) The BBC no longer existed after the rise of Cyber-network. (WEB: Cybus Industries website)
 * John Lumic's Cybus Industries had a high profile internationally. It created the EarPods; owned Vitex, Pete Tyler's nutritional drink company; owned International Electromatics as a front organisation; and had created CybusNet, the world's premier global information system. Secretly, Lumic had them also create the first Cybermen. (DW: Rise of the Cybermen)
 * Even though the Doctor apparently did not exist in this world, Torchwood Institute nevertheless existed. It was operating publicly, with reports it issued being mentioned in the news. (DW: Rise of the Cybermen)
 * The planet had a Bio-Convention, whereby Geneva had to approve any creation of new life forms. (DW: Rise of the Cybermen)
 * Mexico covered far more of North America, including Arizona, and was referred to abroad by its full name, "United States of Mexico"; it had a Prime Minister, indicating a parliamentary or semi-presidential government. (WEB: Cybus Industries website)
 * Europe contained the nations New Germany and Czechoslovenia, which contained Free Information Collectives opposed to Cybus Industries. As the name Czechoslovenia was marked with a trademark symbol on the Cybus website, as with every Cybus product mentioned, it appears Cybus owned the country. (WEB: Cybus Industries website)
 * South America was unified in a South American State; in 2004 it lost 265,000 people across its borders and south, implied to be due to Cyberman experiments. (TS: Tardisode 5)

Post-Cybermen

 * Following the Cybermen incident and the death of the British President, a People's Republic was formed in Britain with Harriet Jones as the new President. (DW: Doomsday)
 * Torchwood was infiltrated by Cybermen, who used its technology to cross dimensions. The Institute was taken over by the People's Republic when the full scale of its activities were discovered; Rose Tyler later joined it. They later went on to work at creating other ways of dimensional travel, and sent agents to 'our' Earth during the 'Stolen Earth' crisis. (DW: Turn Left, The Stolen Earth/Journey's End)
 * A global war was fought against the Cybermen, who were successfully sealed in their factories. However, debate raged about whether or not the Cybermen (as former humans) could be saved, and this gave the Cyber-race time to cross realities. (DW: Doomsday)
 * Due to the mass dimensional travel, ambient temperatures began to rise on Earth; three years on, the ice caps were melting. (DW: Doomsday)
 * By the Cybermen's invasion of our world in 2010, at least five million humans from Pete's World were converted into Cybermen. (DW: Doomsday)

Technological

 * Pete's World had a higher level of technological advancement in general. Such advancements included moving and speaking advertisements, and the EarPod devices which downloaded information straight into human brains. (DW: Rise of the Cybermen / The Age of Steel)
 * Zeppelins served as a common means of transportation. Possibly because the Hindenburg disaster, which facilitated the end of the airship era, did not happen in this universe. (DW: Rise of the Cybermen / The Age of Steel)
 * Scientists developed medallions with the power to enable the wearer to cross universes. Later, they invented a dimension cannon for the same purpose. (DW: Doomsday)
 * The Cyberman technology itself was created by humans, without any apparent use of Mondas technology. (DW: Rise of the Cybermen / The Age of Steel)

People

 * Peter Tyler, unlike his counterpart, had not died in 1987. Both versions had married Jackie, though this couple did not have children. (Instead they had a dog, Rose.) This version of Pete had made a fortune from his company, Vitex, a health drink company which Cybus owned and for which Pete himself acted as spokesman. (DW: Rise of the Cybermen) This version of Jackie underwent cyber-conversion and died. (DW: The Age of Steel) Pete later met and fell in love with the Jackie Tyler of the Doctor's universe. (DW: Doomsday)
 * Ricky, Mickey Smith's counterpart, led the anti-Cybus Industries activists the Preachers with Jake Simmonds, another Preacher. After he died, Mickey decided to stay behind and take his place. (DW: Rise of the Cybermen/The Age of Steel)
 * Deleted scenes from those episodes imply that Ricky and Jake had a romantic relationship.


 * Rita-Anne Smith, Rickey's grandmother, did not die of an accident in this world, whereas Mickey's grandmother had. (DW: Rise of the Cybermen)
 * Harriet Jones, like her counterpart, had a political career, and her rule as President was referred to as a "golden age". (DW: Doomsday)

History
In 2001, Cybus Industries' profits reached $78 billion. In 2004, South American state reported 265,000 people missing. (TS: Tardisode 5)

In February 2007, the Doctor's TARDIS was catapulted into Pete's World while travelling through the Time Vortex. The TARDIS was nearly destroyed by the impact. The Tenth Doctor gave away 10 years of his life to repair the TARDIS. The first Cybermen were created by John Lumic and attacked Great Britain. The Doctor and his allies eventually teamed-up and destroyed the Cybermen. The Cybermen leader, their Controller (with John Lumic’s brain), perished in the destruction of his cyber-factory. After meeting his parallel counterpart Ricky Smith and being inspired by his example, Mickey Smith decided to stay in the alternate universe to take the late Ricky's place and help fight the Cybermen. (DW: Rise of the Cybermen / The Age of Steel)

In 2010, Mickey returned to his original world in Normal Space and, disguised as a lab technician, investigated the Void Ship kept in Torchwood 1's headquarters. (DW: Army of Ghosts)

Jake Simmonds and Peter Tyler crossed over into N-Space to stop the Cyberman invasion. That universe's Jackie Tyler met the other version of Pete Tyler for the first time and decided to stay with him. Mickey Smith, Pete, and Jake returned to the other world, taking Jackie and her daughter Rose with them. Rose joined the parallel version of the Torchwood Institute. Jackie and Pete conceived a child and Mickey apparently took up residence with the Tylers.

Soon after joining Torchwood and several months after Jackie became pregnant, Rose began receiving what appeared to be a message from the Tenth Doctor. With the support of her family, she travelled to a remote fjord in Norway, Dålig Ulv Stranden, where she was able to briefly make contact with the Doctor. Although she was able to tell him that she loved him, he was unable to respond properly before communication is lost. The exchange left Rose and the Doctor emotionally devastated. (DW: Doomsday)

At some point after Jackie gave birth to Tony Tyler, Rose and Torchwood began detecting the onset of "the Darkness": the after-effects of the detonation of the Daleks' reality bomb. They accelerated their work on a "dimension cannon" device capable of transporting Rose back to her original Earth (presumably without the environmental impact of the previous device). This work was successful, and Rose made several trips to her original Earth, where time was running slower and therefore was a couple of years in the past and before the detonation of the reality bomb. It was indicated that the Dimension Cannon may have worked due to the crumbling of the walls of reality as Rose said that it hadn't worked before and the weakening may have allowed a traveller to pass through the walls. The device was also capable of measuring timelines and showed that they all converged on Donna Noble. (DW: Turn Left)

After defeating the Daleks and preventing the reality bomb from detonating, the Tenth Doctor returned Rose and Jackie to the parallel Earth. Also left behind was the Meta-Crisis Tenth Doctor, who began a relationship with Rose. Due to the disarming of the Reality Bomb by Donna Noble, the Darkness never occurred at all and this universe was saved from destruction. (DW: Journey's End)


 * Jackie mentioned that Pete was on the "nursery run"; the child being at nursery school would place this at least 3 years after the birth, either 2013 or 2014.

The Time Traveller's Almanac
The non-narrative source REF: The Time Traveller's Almanac gave further information about Pete's World's chronology.

It said that Cybus Industries was founded by John Lumic in 1982 and in 2005, Cybus purchased Vitex from Pete Tyler.

Creatures and Demons
REF: Doctor Who: Creatures and Demons, a non-narrative source, theorised that Pete's World split from the universe occupying Normal Space when Queen Victoria still went to Torchwood House in 1879. The Werewolf attacked the house and Queen Victoria was killed in this event.