Ever been in a meeting where everyone seems to be speaking a completely different language?
Someone says, "We need to QC the SKUs before we receive the LPNs into the WMS. Also, all DTC and LTL orders should allocate using FIFO."
Everyone around the table nods confidently...
Meanwhile you're wondering if you accidentally walked into a secret society.
If that sounds familiar, you're definitely not alone.
The warehouse, logistics, and fulfillment industry is packed with acronyms and specialized terminology. Whether you're launching your first ecommerce brand, working with a 3PL, joining a warehouse team, or simply trying to understand conversations with customers and vendors, it can feel like learning a new language.
The good news? Once you know the basics, everything starts to click.
This glossary explains some of the most common warehouse, fulfillment, shipping, and ecommerce terms you'll hear throughout the industry. We've also included several newer terms that have become increasingly important as fulfillment continues to evolve through automation, AI, and omnichannel commerce.
Let's decode the language of logistics.
A Warehouse Management System (WMS) is the software that powers daily warehouse operations. It manages inventory, receiving, putaway, picking, packing, shipping, cycle counts, lot tracking, serial numbers, and much more.
Think of it as the brain of the warehouse. Without a WMS, many warehouses rely on spreadsheets or manual processes that increase the risk of inventory errors and shipping mistakes.
An Order Management System (OMS) sits before the warehouse. It receives orders from your ecommerce store, marketplaces, or retailers, applies routing rules, and determines where each order should be fulfilled before sending it to the warehouse.
A Transportation Management System (TMS) helps manage shipping decisions. It selects carriers, applies shipping rules, compares rates, generates labels, and helps optimize transportation costs while ensuring shipments arrive on time.
An ERP connects multiple parts of a business, including accounting, purchasing, inventory, manufacturing, and sales, into one central software platform. Many ERPs integrate directly with WMS and OMS systems to streamline operations.
An API allows different software systems to communicate with one another automatically. APIs are commonly used to connect ecommerce platforms, warehouse systems, shipping software, and inventory management tools.
Electronic Data Interchange (EDI) is the standardized method businesses use to exchange documents like purchase orders, invoices, and shipment notifications electronically. It's commonly required when working with large retailers.
A Third-Party Logistics (3PL) provider stores inventory and fulfills orders on behalf of another business. Instead of operating your own warehouse, you outsource storage, order fulfillment, shipping, returns, and value-added services like kitting or custom packaging.
A Distribution Center (DC) is a warehouse specifically designed to receive, store, process, and distribute products efficiently throughout the supply chain.
Fulfilled by Amazon (FBA) allows sellers to store products in Amazon fulfillment centers. Amazon handles picking, packing, shipping, customer service, and returns.
Amazon regularly updates inventory requirements, storage limits, and fees, making inventory planning especially important for FBA sellers.
With Fulfilled by Merchant (FBM), products are sold on Amazon, but fulfillment is handled by the seller or a third-party fulfillment provider.
Many growing brands use FBM to maintain greater control over inventory while also expanding beyond Amazon into their own ecommerce channels.
Business-to-Business (B2B) fulfillment refers to selling products to retailers, distributors, or wholesalers such as Target, Walmart, REI, or independent retailers.
Orders are typically larger and often require compliance with retailer-specific routing guides and shipping requirements.
Business-to-Consumer (B2C) fulfillment refers to shipping products directly to individual customers through ecommerce websites, marketplaces, or social commerce platforms.
Direct-to-Store shipping delivers products directly to retail store locations instead of first sending inventory to a retailer's distribution center.
Omnichannel fulfillment allows businesses to manage inventory across multiple sales channels, including ecommerce websites, Amazon, Walmart Marketplace, retail stores, and wholesale, from one centralized inventory system.
Small Parcel shipments are individual packages that don't require palletized freight. Common carriers include UPS, FedEx, USPS, DHL, and regional parcel carriers.
Transit times generally range from one to five business days depending on destination.
Less Than Truckload (LTL) shipping is used for palletized freight that doesn't require an entire trailer.
LTL is typically the most cost-effective option for shipments weighing more than approximately 250 pounds but less than a full truckload.
Full Truckload shipping uses an entire trailer dedicated to one shipment. This option is often preferred for large shipments, high-value freight, or time-sensitive deliveries.
Proof of Delivery confirms that a shipment successfully reached its destination and was received by the intended recipient.
A Bill of Lading is the legal document that accompanies freight shipments. It outlines shipment details and serves as the chain of custody between the shipper, carrier, and receiver.
An Advance Ship Notice (ASN) is an electronic notification sent before a shipment arrives, allowing the receiving warehouse or retailer to prepare for incoming inventory.
A SKU is the unique identifier assigned to each product variation, helping warehouses accurately track inventory.
An LPN is a unique barcode assigned to a pallet or group of inventory that allows warehouses to track inventory movements efficiently.
A Serialized Carton Number uniquely identifies an individual carton and connects it to a specific order for tracking throughout fulfillment.
A Serialized Pallet Number identifies an entire pallet and links together all cartons assigned to that shipment.
FIFO ensures the oldest inventory received is shipped first. This is commonly used for products with shelf life or expiration dates.
LIFO prioritizes shipping the newest inventory first. While less common in fulfillment, it can be appropriate in certain inventory strategies.
FEFO prioritizes shipping inventory with the earliest expiration date first, helping reduce waste and ensure product freshness.
Rather than counting all inventory once a year, cycle counting involves regularly counting smaller portions of inventory throughout the year to maintain inventory accuracy.
Slotting is the strategic placement of products throughout a warehouse to reduce travel time and improve picking efficiency.
Pick path optimization uses software to determine the fastest route through the warehouse for order pickers, reducing fulfillment time and labor costs.
Quality Control (QC) includes the inspections and procedures designed to ensure products meet quality standards before shipping.
Statistical Process Control uses sampling and data analysis to monitor quality throughout production or kitting projects rather than inspecting every item.
A Bill of Materials lists every component and quantity required to build or assemble a finished product or kit.
Reverse logistics refers to the movement of products from customers back to the warehouse for returns, repairs, refurbishment, recycling, or disposal.
Returns management is the process of receiving, inspecting, restocking, refurbishing, or disposing of returned products efficiently while protecting customer satisfaction.
Artificial Intelligence is transforming warehouse operations by improving demand forecasting, labor planning, inventory optimization, customer support, and order routing.
Rather than replacing people, AI is increasingly helping warehouse teams make faster, smarter decisions.
AMRs are robots that safely navigate warehouses without fixed tracks, transporting inventory between workstations to reduce employee travel time.
Collaborative robots, or cobots, are designed to work safely alongside warehouse employees by assisting with repetitive tasks like picking, packing, palletizing, and sorting.
Inventory visibility is the ability to see accurate, real-time inventory levels across warehouses, fulfillment centers, retail stores, and ecommerce channels.
As our services expanded beyond kitting to include comprehensive B2B and B2C fulfillment, ecommerce support, and warehouse solutions, we rebranded to KSP Fulfillment in 2018 to better reflect the full range of services we provide today.
While our name has evolved, our commitment to helping brands grow through reliable fulfillment has remained the same.
Now that you're more familiar with the language of logistics, you'll be better equipped to evaluate fulfillment partners, navigate shipping conversations, and make informed decisions for your business.
If you're looking for a fulfillment partner that values clear communication instead of confusing jargon, we'd love to help. Whether you're shipping direct to consumer (DTC), wholesale, or both, our team is here to make fulfillment simpler.