This document discusses the four main types of artificial intelligence: 1. Reactive machines like IBM's Deep Blue chess computer that can perceive the current situation but not learn from experience or store memories. 2. Limited memory machines like self-driving cars that can observe objects over time and integrate past perceptions with programmed representations of the world. 3. Theory of mind machines that can form representations not just of the world but of other agents and understand they have thoughts and feelings that influence behavior. 4. Self-aware machines that can form representations of themselves and have consciousness, extending the theory of mind to the machine itself.

1. TYPES OF ARTIFICIAL
INTELLIGENCE

2. 1. Reactive Machines
The most fundamental kinds of AI frameworks are absolutely
receptive, and have the capacity neither to shape recollections
nor to use past encounters to advise current choices. Dark Blue,
IBM's chess-playing supercomputer, which beat universal
grandmaster Garry Kasparov in the late 1990s, is the ideal case
of this sort of machine.
Dark Blue can distinguish the pieces on a chess board and skill
every move. It can make forecasts about what moves may be
next for it and its rival. Also, it can pick the most ideal moves
from among the conceivable outcomes.

3. 2. Limited Memory
This Type II class contains machines can investigate the past. Self-
driving vehicles do a portion of this as of now. For instance, they watch
other vehicles' speed and course. That isn't possible in an only one
second, yet rather requires recognizing explicit items and observing
them after some time.
These perceptions are added to oneself driving vehicles' prearranged
portrayals of the world, which likewise incorporate path markings,
traffic lights and other significant components, similar to bends in the
street. They're incorporated when the vehicle chooses when to switch
to another lane, to abstain from removing another driver or being hit
by a close by vehicle.

4. 3. Theory Of Mind
We may stop here, and consider this point the significant partition
between the machines we have and the machines we will work later on.
Be that as it may, it is smarter to be progressively explicit to talk about
the sorts of portrayals machines need to frame, and what they should
be about.
Machines in the following, further developed, class structure portrayals
about the world, yet in addition about different specialists or
substances on the planet. In brain science, this is designated
"hypothesis of psyche" – the understanding that individuals, animals
and articles on the planet can have musings and feelings that influence
their own conduct.

5. 4. Self-awareness
The last advance of AI improvement is to assemble frameworks that
can shape portrayals about themselves. Eventually, we AI scientists
won't just get awareness, however fabricate machines that have it.
This is, as it were, an augmentation of the "hypothesis of brain"
controlled by Type III man-made brains. Cognizance is likewise called
"mindfulness" which is as it should be.
We expect somebody blaring behind us in rush hour gridlock is furious
or anxious, on the grounds that that is the manner by which we feel
when we sound at others. Without a hypothesis of psyche, we were
unable to make those sorts of surmisings.

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