Computing and the WebComputing and the WebComputers: A First LookComputers: A First Look

Computers: A First LookComputers: A First Look Beyond the Computer InvasionBeyond the Computer Invasion

– How many “computers” do you utilize in an How many “computers” do you utilize in an average day?average day?

– How many computers exist “behind the How many computers exist “behind the scenes” to support the ones you are using?scenes” to support the ones you are using?

– How much information are you exposed to How much information are you exposed to via these computers?via these computers?

How much more than your parents?How much more than your parents?– 2X2X– 4X4X– ?X?X

What is (and isn’t) a What is (and isn’t) a ComputerComputer Computers have become commoditiesComputers have become commodities

– Greeting CardsGreeting Cards– Audio equipment (MP3, iPod, etc)Audio equipment (MP3, iPod, etc)

Computers are ingrained in everythingComputers are ingrained in everything Are the following devices a computer?Are the following devices a computer?

Classification?Classification?

Babbage’s Babbage’s Difference Difference EngineEngine

Classification?Classification?

Bathroom / Bathroom / Postal ScalePostal Scale

Classification?Classification?

AbacusAbacus

Classification?Classification?

Ovaltine Ovaltine Decoder RingDecoder Ring

Classification?Classification?

StonehengeStonehenge

What is (and isn’t) a What is (and isn’t) a ComputerComputer How about:How about:

– PDA’sPDA’s– Cell PhoneCell Phone– CalculatorCalculator– CalendarCalendar– E-BookE-Book

Text book definition:Text book definition:– A device that takes data in one form, processes, it,

and transforms it into information that is more useful than the original data

What is (and isn’t) a What is (and isn’t) a ComputerComputer A closer look: the Decoder RingA closer look: the Decoder Ring

What is (and isn’t) a What is (and isn’t) a ComputerComputerCoded message:

1,7,19,17,0,23,20,0,10,26,7,0,7,11,7,24,16

Key Y = 1: YWJO QB VUW WHWZPKey Y = 2: ULEP NJ MGL LVLQDKey Y = 3: GSOD TE IZS SMSNXKey Y = 4: ZAPX BO WQA AIATKKey Y = 5: QCDK JP LNC CWCBFKey Y = 6: NRXF ED STR RLRJHKey Y = 7: TYKH OX ABY YSYEVKey Y = 8: BUFV PK CJU UAUOMKey Y = 9: JGHM DF REG GCGPIKey Y = 10: EZVI XH YOZ ZRZDWKey Y = 11: OQMW KV UPQ QYQXLKey Y = 12: PNIL FM GDN NUNKS

Key Y = 13: DTWS HI ZXT TGTFAKey Y = 14: XBLA VW QKB BZBHCKey Y = 15: KJSC ML NFJ JQJVRKey Y = 16: FEAR IS THE ENEMYKey Y = 17: HOCY WA BVO OTOIUKey Y = 18: VPRU LC JMP PBPWGKey Y = 19: MDYG SR EID DJDLZKey Y = 20: IXUZ AY OWX XEXSQKey Y = 21: WKGQ CU PLK

KOKANKey Y = 22: LFZN RG DSF FPFCTKey Y = 23: SHQT YZ XAH HDHRBKey Y = 24: AVNB UQ KCV VXVYJKey Y = 25: CMTJ GN FRM MKMUEKey Y = 26: RIBE ZT HYI IFIGO

Classification of ComputersClassification of Computers Electrical vs MechanicalElectrical vs Mechanical Digital vs AnalogDigital vs Analog Special Purpose vs General PurposeSpecial Purpose vs General Purpose

Classification of ComputersClassification of Computers What is this?What is this?

Classification of ComputersClassification of Computers

The Commodore PET 2001 was a very The Commodore PET 2001 was a very successful machine. Four models were successful machine. Four models were made: early 4KB models, the PET 2001-8N made: early 4KB models, the PET 2001-8N with 8 KB RAM, PET 2001-16N with 16 KB with 8 KB RAM, PET 2001-16N with 16 KB RAM and the PET 2001-32N with 32K RAM. RAM and the PET 2001-32N with 32K RAM.

Classification of ComputersClassification of ComputersNAME PET 2001 MANUFACTURER Commodore TYPE Professional Computer ORIGIN U.S.A. YEAR 1977 BUILT IN LANGUAGE Commodore Basic 1.0 KEYBOARD 73 key 'chicklet' keyboard with

numeric keypad CPU 6502 SPEED 1 mHz RAM 4 KB (early version) then 8 KB VRAM 1 KB ROM 14 KB TEXT MODES 40 x 25 GRAPHIC MODES None COLORS Monochrome