it (information technology) for the manager
DESCRIPTION
Lecture given at the IDC, Herzliya to the Business Administration class. April 2014TRANSCRIPT
Overview of Information Technology
for the manager
The IDC, Herzliya
The fundamentals
5V
0V
0 1 1 1 0 0 0 0 1 1 0 0
Clock
Value
the bit (b) 1 or 0 Aka (+ or -) or (Y or N)….
the BYTE (B) 1 0 0 1 0 0 1 0
The pace of the clock is measured in Hertz KHertz
The fundamentals
the BYTE (B) 1 0 0 1 0 0 1 1 A Byte values: from 0 to 255 or from 0 to 127 with parity
128 + 16 + 2+1 = 147
A Byte can represent:
all the Digits: 0 , 1 , 2 , ………, 9
all the Characters a, b, c, …….., y, z
even upper case A, B, C, ……., Y, Z
a second Alphabet א,ב ,ג ש, ת ,..……
punctuation: . , ; ! ( ) “
Control Signs ^Z ^X ^C ^Y
The fundamentals
We need a lot of Bytes…… Kbytes 1024 Mbytes ~1,000,000 GB ~1,000,000,000 TB PB
We need to transfer them fast 9600 Kb/sec Kb/sec Mb/sec Gb/sec
The fundamentals
We can do graphical design with digits…..
0 0 0 0 0 0 0 1 1 1 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 1 1 1 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0
And add colors…..
8 bits per pixel = 256 colors
16 bits per pixel = 65,536 colors
32bits per pixel ~ 4,000,000,000 colors
The fundamentals - Hardware
0 0 0 0 0 0 0 1 1 1 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 1 1 1 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0
1 0 0 1 0 0 1 1
0 0 0 1 0 0 1 0 + = 1 0 1 0 0 1 0 1
CPU Memory Logic, Logic and Logic
1 AND 1 -> 1
1 AND 0 -> 0
NOT 1 -> 0
1 OR 0 -> 1
The Accumulator
I/O input Output Keyboard Screen Mouse …….
Storage Hard Drive Optical Drive SSD DOK
Network/ Communication Internal Bus Ethernet USB, Bluetooth
The Command
ADD c, a, b
1 1 1 0 0 1 0 1
The fundamentals - Layers
HARDWARE IBM, HP, Dell, SAMSUNG, Apple, LENOVO, INTEL
Operating System Windows, UNIX (Linux, Ubuntu…), MacOS, Android, IOS, Z-OS
Virtualization
I/O GUI UX
Applications
Communication &
Networking RS232c TCP/IP
FTP AppleTalk
SNA GSM
WiFi 802.11
Storage &
File System &
Databases NTFS
ORACLE, DB2, MySQL MSSQL, MongoDB
The fundamentals - HW
The fundamentals – File System
……
…
…
Y File 1 17 40 52
Blocks Allocation Map
Physical Hard Drive
Y/N Fname Blocks
Y File 2 123 124 125 222 60
The Fundamentals - Database
DoB Add. Tel Name EmpID
Title % FTE Start Rate Project EmpID
Employees Table
Employees Allocation Table
SQL CREATE Table <Employees> SELECT RATE FROM TABLE=< > WHERE EMPID=< >
Normalized Indexes Joins
The Fundamental – Program & Apps
Source Code Program Sal Print ‘Enter your name and hourly rate’ Read Char Name Read Int Rate Print ‘Hello ’, Name, ‘your salary is: ’, Rate*160 end
Binary code
01010101010101 11110101010001 10000101000101 10001010101010 10100111111010 11110100100000 11111100000000 11010010101010 10000000000111 11110010101011 11110010000000
Compilation
Libraries
Open Source
DataBase (SQL)
O/S
Graphics
Executable
01010101010101 11110101010001 10000101000101 10001010101010 10100111111010 11110100100000 11111100000000 11010010101010 10000000000111 11110010101011 11110010000000 10001010101010 10001010101010 11111001110111 01111101110100 11111111111011 linking
The Fundamentals - Environments
Developer Area Development Unitest TEAM Area Configuration Version Control System Test QA Team System Test Regression test Performance Test User UAT User Acceptance test User PRODUCTION HA & DR Backup
Salary
מעקב שעות
Salary
Work hour report
מעקב שעות
המלאיניהול
Salary
Work hour report
inventory
הנהלת חשבונות
מעקב שעות
המלאיניהול
לניהול ומעקב הלקוחות
Salary
Work hour report
inventory accounting
הנהלת חשבונות
מעקב שעות
המלאיניהול
לניהול ומעקב הלקוחות
Salary
Work hour report
inventory הנהלת חשבונות
Customers managemnt
הנהלת חשבונות
מעקב שעות
המלאיניהול
לניהול ומעקב הלקוחות
Salary
Work hour report
inventory הנהלת חשבונות
Customers managemnt
• KISS
• RTFM
• Go for the NIH
• The ‘Out of the Box’ method
• Use Clouds, Service Bureau
• Trust the people you trust
– Lawyer, CPA, Mom&Dad
• Hire Expert(s)
• Friends, Family & Partners
The Org Charts Of All The Major Tech Companies (Humor)
: http://www.businessinsider.com/big-tech-org-charts-2011-6#ixzz2qMENzlku
telephony
website
Productivity tools (MS-Office
network
PCs
• Usually not your CORE business
• Essential, Critical element of the organization
• Technological, Complex, Sensitive
• Develops and changes at the fastest Rate
• Becomes more and more Strategic
• CAN MAKE A DIFFERENCE !