2) Mobile Intel 945Pm Express chipset
chipset of laptop CPU

3) Intel Pro/wirelss 3945 ABG Network connection
device in laptop for wireless connection, with 1) and 2) together form a laptop of the Centrino platform

4) 1024MB(512 *2) DDR2
RAM or memory, good enough for home use or laptop

5)5 in 1 card reader
reads memory cards used in digital cameras

6) 56 k modem
used to connect to Internet, hardly used nowadays

7) 100/ 100 802.11abg
specifications for wireless connection

8) 120 GB 5,400rpm
laptop hard drive, too small for desktop

9) Nvidia , geforce
video card

10) onboard VGA
video embedded (built-in) in the motherboard, may be good enough for you

11) Intel Viiv technology
technology used by Intel, the leading computer chip manufacturer (AMD the other)

12) 320 GB SATA
serial ATA hard drive for desktop, might not be installed in some motherboards (that use IDE), big enough for home use, but might be inadequate if you have lots of images and videos

13) 2 * 2MB L2 Cache, 3ghz, 800MHZ FSB)
chip specs, good enough for home use

14) 802.11 bg wireless with acer signal up technology
wireless produced by Acer

15)Multi layer blue tooth
wireless connection used in laptops, printers, cell phones, etc, doesn’t cover much distance

2.The Mobile Intel® 945PM Express chipset delivers outstanding system performance through high-bandwidth interfaces such as dual-channel DDR2 memory, 667 MHz system bus, PCI Express* x16 graphics port and PCI Express x1 I/O ports, next generation Serial ATA and Hi-Speed USB 2.0 connectivity.

3.The Intel PRO/Wireless Network Connection provides freedom and flexibility to work and play without hunting for a phone jack, network cable, or plugging in a special card.

4.Multi layer blue tooth; Bluetooth supports transmission of voice anddata over 2.4GHz radio frequency,which is the unlicensed Industrial- Scientific-Medical band(ISM).It use a frquency-hopping scheme of 1600 hops per second.

5. Stands for Basic Input/Output System also incorrectly known as Basic Integrated Operating System and occasionally Built In Operating System. BIOS refers to the firmware code run by an IBM compatible PC.

6. Complementary metal–oxide–semiconductor (CMOS) It is used in chips such as microprocessors, microcontrollers, static RAM, and other digital logic circuits. CMOS technology is also used for a wide variety of analog circuits such as image sensors, data converters, and highly integrated transceivers for many types of communication.

7. You can learn more about the systems management and computer troubleshooting by purchasing A+ certification book from microsoft.

Finally, The computer system should be good for you to load alot of products and downloads.

You should be able to get the required info on each of your items by simply cutting and pasting into your preferred search engine such as Google. For example:
1) Intel Core 2 duo Processor
http://www.intel.com/products/processor/core2duo/index.htm

intel 945 means chipset

1024 means RAm

5 in 1 card reader means card reader

Go to Wikipedia and search for each of the terms. Then, re-post with a specific question.

Why don’t you ask the people you are buying the PC from for this information?

“best to study about systems management”. Good luck with that.