diff --git a/education/computer engineering/ECE2700/Digital Hardware.md b/education/computer engineering/ECE2700/Digital Hardware.md
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-Any product that contains a logic circuit is classified as digital hardware. 
+Any poduct that contains a logic circuit is classified as digital hardware. 
 - Moore's Law states that the number of a transistors on a chip doubles every two years
 	- The International Technology Roadmap for Semiconductors (ITRS) forecasts technology, including the number of transistors on a chip
 - Multiple integrated circuits can be connected using a printed circuit board, or PCB.
 - *Standard chips* conform to an agreed upon standard for functionality and physical configuration. They are usually less than 100 transistors in size, and provide basic building blocks for logic.
 	- These chips are combined to form a larger logic circuit
-	- THey were popu
+	- They were popular until the 1980s
+	- As ICs improved, it became inefficient space-wise to have separate chips for each logical building block
+	- The functionality of these chips is fixed, and they do not change.
+# Programmable Logic Devices
+Programmable logic devices (PLDs) include a number of programmable switches that can configure the internal circuitry of a chip
+- The most common type of PLD is a Field Programmable Gate Array (FPGA)
+- FPGAs are widely available, but come with the drawback that they're limited in speed and performance
+
+# Application Specific Integrated Circuits
+Application Specific Integrated Circuits (ASICs) have higher maximum performance and transistor density compared to FPGAs, but the cost of production is very high.
+- A logic circuit is made of connected logic gates
+
+# Binary Numbers
+
 # Definitions
 - **Xtor** is an abbreviation for *transistor*
 - **Moore's Law** states that the number of transistors on a chip doubles every two years.
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