COMPILER is a story about the Igarashi brothers Nachi and Toshi, and two beauties from another dimension, Compiler and Assembler. Originally sent to conquer Earth through a game of destruction and creation, Compiler and Assembler ended up deciding that living in our world is more fun than conquering it. They moved in with Nachi and Toshi. A growing relationship began to develop between Nachi and Compiler, and Toshi and Assembler, though none of them can bring themselves to admit it outright.
Meanwhile, the people who sent Compiler and Assembler to conquer Earth were outraged by their apparent betrayal. They sent two assassins, Bios and Directory, to deal with the renegades and proceed with the invasion plan. And so, the misadventures begin...
info ref: mangaupdates.com

A manga about general car appreciation, or "Car Life" as it is known to auto enthusiasts.
The main character's father passes away. On the will states that each of the three siblings receives a portion of the father's wealth. The main character receives a Porsche Carrera. She doesn't know what a Porsche Carrera looks like, didn't know the car company Porsche, can't drive a manual and had absolutely no interest in cars, at the time. You can follow along and find out what some car enthusiast do. (Source: mangaupdates)

Hiro is a high school student refusing to go to school after a traumatic run-in with the local bullies. But his feeble life is forever changed when, one day, he applies online for a new gadget called "JUNK".

In A.D. 1997. Having failed to conqer the Earth, Compiler and Assembler from Another World settle down in the residence of Nati and Toshi Igarashi whom they choose as their partners. As they start their literally unworldly community life, various Sudaran assassins arrive from Another World one after another to attack Compiler and Assembler, until, in good time, all of those begin to turn into old memories... Yes, in 2000, the last year of the century, Assembler has started to lead quite a different life --- a life as a "human being"...

A Robot War ensued an a small robot production island in the Pacific in the year 2025, where sentient supercomputer, Kyron 5, has decided that Mankind was irrelevant. A mecha battalion of Gunhed warriors – huge transformer style tanks – were dispatched to eliminate Kryon 5. They didn’t succeed, but Kyron 5 was essentially marginalized, so no more force was sent. Now, 13 years later, due to a depletion of world resources, the key component that creates supercomputers, Texmexium (I shit you not – this is the name!), is in short supply, as are spare microchips. A group of scavengers have decided to enter the “forbidden zone” and go to the Island in the hopes of collecting Gunhed chips, which are now worth more than gold.

In the 21st century, just when the human race needs new heroes, the Lucifer Hawks enter Earth's dimension. The members of the A.M.P., six young women with incredible powers, are set to defend the human rece against these monstrous entities from another world.
(Source: Viz)

Note: This is the Asamiya version of the manga.
A schoolgirl gains self-confidence, new friends, and a cache of chic outfits when she becomes the computer-programming magical girl, Corrector Yui. She must stop the rogue A.I. Gurossa (Artificial Intelligence computer program) and his hench-programs from taking control of the global computer network. In this future, all human activity is supported by computers, so it's possible to control the world using the network.

Important note: There are two versions of the Corrector Yui manga series. This is the original one that was written and drawn by Kia Asamiya and published by Shogakkukan in Japan and does not have a release date in the States yet. The Corrector Yui manga that Tokyopop is publishing is done by shojo artist Keiko Okamoto and is a manga adaptation of the anime series.

Source: Manga-Updates