The BBC News website visited Nigeria to see Africa's first large scale test of the XO laptop - a portable computer designed for the world's poorest children.
The One Laptop Per Child Project's so-called $100 laptop, also known as the XO, incorporates technology and software specially developed to cope with the inhospitable conditions found in many developing nations.
Intel's laptop for developing world children, the Classmate, is also being distributed in Nigeria and around the world.
In order to save power and production costs it is smaller than a traditional laptop and has no CD-drive.
1. '$100 LAPTOP' FOUNDER
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$100 Laptop founder Nicholas Negroponte says he ignores criticism of the project.
The entire ethic of the OLPC Project has come in for criticism from aid agencies and governments.
Some believe its business model is flawed and that money could be better spent on basic necessities or training teachers.
2. THE XO IN NIGERIA
Rory Cellan-Jones visited Galadima Primary School on the outskirts of Abuja, Nigeria where children are testing the XO laptop.
But the government has voiced reservations about whether the project is worth the cost.
3. XO'S ENERGY-SAVING
The XO laptop has unique methods of conserving battery power.
Its screen is lit by daylight and it uses flash memory instead of a hard drive, enabling it to have no electrically powered moving parts.
4. XO'S 'Y0-YO' CHARGER
The XO is designed to be used in remote areas where electricity can be intermittent and in short supply.
The developers have made prototypes of a ripcord charger to allow children to recharge the battery by hand.
5. XO'S EDUCATIONAL SOFTWARE
The operating system of the XO laptop is based on Linux open source software.
Educational packages in commonly used languages have been loaded onto each notebook, as Rory Cellan-Jones explains.
6. LIFTING THE XO'S HOOD
Click's Andrew Webb travelled to the Massachusetts Institute of Technology to meet the XO's designers and software writers.
He reports on how engineers had to ignore convention when developing the device.
7. INTEL CLASSMATE DEMO
The Intel Classmate is a more traditional PC than the One Laptop Per Child project's computer.
It comes with Windows XP loaded, but can also run Linux, as Rory Cellan-Jones reports from Nigeria.
8. CHILDREN'S FIRST CLASSMATE
The first time that some children at Jabi School near Abuja saw a computer was when the Classmate PC arrived.
They have quickly learnt to carry out research over the internet.
9. XO VERSUS CLASSMATE
The trials of One Laptop Per Child's XO and Intel's Classmate in Nigeria will help both organisations plan the rollout of their products.
Rory Cellan-Jones looks at how the two schemes are operating.
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